What Makes Indoor Air Unhealthy? | American Lung Association

<!DOCTYPE html><html lang="en"><head data-ktc-search-exclude=""> <title>What Makes Indoor Air Unhealthy? | American Lung Association</title>  <script type="text/javascript" src="//cdn-4.convertexperiments.com/js/10043493-100411849.js"></script>  <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta class="swiftype" name="title" data-type="string" content="What Makes Indoor Air Unhealthy?"> <meta name="description" class="swiftype" data-type="string" content="Poor indoor air quality can cause or worsen lung diseases. Find out what makes indoor air unhealthy and how to protect your family. "> <meta class="swiftype" name="keywords" data-type="string" content=""> <meta property="og:title" content="What Makes Indoor Air Unhealthy? "> <meta property="og:description" content="Learn about indoor air pollutants and sources of indoor air pollution. "> <meta property="og:image" content="https://www.lung.org/getmedia/2158f9ec-ddfd-4877-9705-f507b0f887b2/mold_1200x630_F.jpg?width=1200&height=630&ext=.jpg"> <meta property="og:image:secure_url" content="https://www.lung.org/getmedia/2158f9ec-ddfd-4877-9705-f507b0f887b2/mold_1200x630_F.jpg?width=1200&height=630&ext=.jpg"> <meta property="og:url" content="https://www.lung.org/clean-air/indoor-air/indoor-air-pollutants"> <meta property="twitter:card" content="What Makes Indoor Air Unhealthy?"> <meta property="og:type" content="website"> <meta property="fb:app_id" content="906853126076689"> <meta name="author" content="American Lung Association"> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <link rel="apple-touch-icon-precomposed" sizes="57x57" href="/icons/custom/apple-touch-icon-57x57.png"> <link rel="apple-touch-icon-precomposed" sizes="114x114" href="/icons/custom/apple-touch-icon-114x114.png"> <link rel="apple-touch-icon-precomposed" sizes="72x72" href="/icons/custom/apple-touch-icon-72x72.png"> <link rel="apple-touch-icon-precomposed" sizes="144x144" href="/icons/custom/apple-touch-icon-144x144.png"> <link rel="apple-touch-icon-precomposed" sizes="60x60" href="/icons/custom/apple-touch-icon-60x60.png"> <link rel="apple-touch-icon-precomposed" sizes="120x120" href="/icons/custom/apple-touch-icon-120x120.png"> <link rel="apple-touch-icon-precomposed" sizes="76x76" href="/icons/custom/apple-touch-icon-76x76.png"> <link rel="apple-touch-icon-precomposed" sizes="152x152" href="/icons/custom/apple-touch-icon-152x152.png"> <link rel="icon" type="image/png" href="/icons/custom/favicon-196x196.png" sizes="196x196"> <link rel="icon" type="image/png" href="/icons/custom/favicon-96x96.png" sizes="96x96"> <link rel="icon" type="image/png" href="/icons/custom/favicon-32x32.png" sizes="32x32"> <link rel="icon" type="image/png" href="/icons/custom/favicon-16x16.png" sizes="16x16"> <link rel="icon" type="image/png" href="/icons/custom/favicon-128.png" sizes="128x128"> <meta name="application-name" content=" "> <meta name="msapplication-TileColor" content="#FFFFFF"> <meta name="msapplication-TileImage" content="/icons/custom/mstile-144x144.png"> <meta name="msapplication-square70x70logo" content="/icons/custom/mstile-70x70.png"> <meta name="msapplication-square150x150logo" content="/icons/custom/mstile-150x150.png"> <meta name="msapplication-wide310x150logo" content="/icons/custom/mstile-310x150.png"> <meta name="msapplication-square310x310logo" content="/icons/custom/mstile-310x310.png"> <link rel="canonical" href="https://www.lung.org/clean-air/indoor-air/indoor-air-pollutants"> <meta class="swiftype" name="subtopic" data-type="string" content="healthy-air"> <meta class="swiftype" name="subtopic-labels" data-type="string" content="Healthy Air">  <link href="/dist/generalcontent.min.css?v=119d2041-4002-43b0-ae56-9444ba38e884_1_432fcce2a802deebacef3a4a3f1dfc26" rel="stylesheet" type="text/css">  <link rel="stylesheet" href="https://cdn.icomoon.io/179694/Lungorg/style.css?nf7qi6?119d2041-4002-43b0-ae56-9444ba38e884">  <script src="https://www.googleoptimize.com/optimize.js?id=GTM-PTTRKL8"></script>  <script type="text/javascript">window._svq = window._svq || []; window._svq.push(['_setAccount', '2905_03975']); window._svq.push(['_trackPageView']); (function (d, c) { var sv = d.createElement(c); sv.type = 'text/javascript'; sv.src = '//track.securedvisit.com/js/sv.js'; var s = d.getElementsByTagName(c)[0]; s.parentNode.insertBefore(sv, s); })(document, 'script');</script>   <script> (function (w, d, s, l, i) { w[l] = w[l] || []; w[l].push({ 'gtm.start': new Date().getTime(), event: 'gtm.js' }); var f = d.getElementsByTagName(s)[0], j = d.createElement(s), dl = l != 'dataLayer' ? '&l=' + l : ''; j.async = true; j.src = 'https://www.googletagmanager.com/gtm.js?id=' + i + dl; f.parentNode.insertBefore(j, f); })(window, document, 'script', 'dataLayer', 'GTM-P37QJ4');</script>   <link rel="preconnect" href="https://dev.visualwebsiteoptimizer.com"> <script type="text/javascript" id="vwoCode"> window._vwo_code || (function() { var account_id=1025125, version=2.1, settings_tolerance=2000, hide_element='body', hide_element_style = 'opacity:0 !important;filter:alpha(opacity=0) !important;background:none !important;transition:none !important;', /* DO NOT EDIT BELOW THIS LINE */ f=false,w=window,d=document,v=d.querySelector('#vwoCode'),cK='_vwo_'+account_id+'_settings',cc={};try{var c=JSON.parse(localStorage.getItem('_vwo_'+account_id+'_config'));cc=c&&typeof c==='object'?c:{}}catch(e){}var stT=cc.stT==='session'?w.sessionStorage:w.localStorage;code={nonce:v&&v.nonce,use_existing_jquery:function(){return typeof use_existing_jquery!=='undefined'?use_existing_jquery:undefined},library_tolerance:function(){return typeof library_tolerance!=='undefined'?library_tolerance:undefined},settings_tolerance:function(){return cc.sT||settings_tolerance},hide_element_style:function(){return'{'+(cc.hES||hide_element_style)+'}'},hide_element:function(){if(performance.getEntriesByName('first-contentful-paint')[0]){return''}return typeof cc.hE==='string'?cc.hE:hide_element},getVersion:function(){return version},finish:function(e){if(!f){f=true;var t=d.getElementById('_vis_opt_path_hides');if(t)t.parentNode.removeChild(t);if(e)(new Image).src='https://dev.visualwebsiteoptimizer.com/ee.gif?a='+account_id+e}},finished:function(){return f},addScript:function(e){var t=d.createElement('script');t.type='text/javascript';if(e.src){t.src=e.src}else{t.text=e.text}v&&t.setAttribute('nonce',v.nonce);d.getElementsByTagName('head')[0].appendChild(t)},load:function(e,t){var n=this.getSettings(),i=d.createElement('script'),r=this;t=t||{};if(n){i.textContent=n;d.getElementsByTagName('head')[0].appendChild(i);if(!w.VWO||VWO.caE){stT.removeItem(cK);r.load(e)}}else{var o=new XMLHttpRequest;o.open('GET',e,true);o.withCredentials=!t.dSC;o.responseType=t.responseType||'text';o.onload=function(){if(t.onloadCb){return t.onloadCb(o,e)}if(o.status===200||o.status===304){_vwo_code.addScript({text:o.responseText})}else{_vwo_code.finish('&e=loading_failure:'+e)}};o.onerror=function(){if(t.onerrorCb){return t.onerrorCb(e)}_vwo_code.finish('&e=loading_failure:'+e)};o.send()}},getSettings:function(){try{var e=stT.getItem(cK);if(!e){return}e=JSON.parse(e);if(Date.now()>e.e){stT.removeItem(cK);return}return e.s}catch(e){return}},init:function(){if(d.URL.indexOf('__vwo_disable__')>-1)return;var e=this.settings_tolerance();w._vwo_settings_timer=setTimeout(function(){_vwo_code.finish();stT.removeItem(cK)},e);var t;if(this.hide_element()!=='body'){t=d.createElement('style');var n=this.hide_element(),i=n?n+this.hide_element_style():'',r=d.getElementsByTagName('head')[0];t.setAttribute('id','_vis_opt_path_hides');v&&t.setAttribute('nonce',v.nonce);t.setAttribute('type','text/css');if(t.styleSheet)t.styleSheet.cssText=i;else t.appendChild(d.createTextNode(i));r.appendChild(t)}else{t=d.getElementsByTagName('head')[0];var i=d.createElement('div');i.style.cssText='z-index: 2147483647 !important;position: fixed !important;left: 0 !important;top: 0 !important;width: 100% !important;height: 100% !important;background: white !important;display: block !important;';i.setAttribute('id','_vis_opt_path_hides');i.classList.add('_vis_hide_layer');t.parentNode.insertBefore(i,t.nextSibling)}var o=window._vis_opt_url||d.URL,s='https://dev.visualwebsiteoptimizer.com/j.php?a='+account_id+'&u='+encodeURIComponent(o)+'&vn='+version;if(w.location.search.indexOf('_vwo_xhr')!==-1){this.addScript({src:s})}else{this.load(s+'&x=true')}}};w._vwo_code=code;code.init();})(); </script>  </head> <body>  <noscript> <iframe src="https://www.googletagmanager.com/ns.html?id=GTM-P37QJ4" height="0" width="0" style="display:none;visibility:hidden"></iframe> </noscript>  <header class="header" data-scroll-header="" data-ktc-search-exclude=""> <a href="#main" class="skip-link show-on-focus">Skip to main content</a> <div class="header-wrap js-header-wrap"> <div class="full-width-container"> <div class="header-inner"> <div class="header-inner-wrap"> <a class="header-logo" href="/"> <img class="no-lazy" src="/Content/images/header-logo.svg" alt="American Lung Association Logo"> </a> <a class="header-donate contact-toggle header-toggle" href="/donate" tabindex="-1"> <span><span class="icon-heart"></span>Donate</span> </a> <button class="search-toggle header-toggle js-search-toggle" type="button" tabindex="-1"> <span> <span class="icon-search"></span> <span class="icon-close"></span> <span class="open">Search</span> <span class="close">Close</span> </span> </button> <button type="button" class="nav-toggle header-toggle js-nav-toggle" tabindex="-1"> <span><span class="icon-menu"></span><span class="open">Menu</span><span class="close">Close</span></span> </button> <div class="header-info header-help-line"> <div class="header-info-phone"> <a class="js-helpline-modal"><span class="icon-phone-call"></span>Call the Lung HelpLine</a> </div> <div class="header-info-links"> <a href="/support-community/lung-helpline-and-tobacco-quitline"><span class="icon-email"></span>Ask a Question</a> <a href="javascript:void(0)" id="liveagent-chat-link" class="livechat-link" data-livechat="" style="display: none;"><span class="icon-word-balloon"></span>Live Chat</a> </div> </div> </div> <ul class="header-utilities"> <li><a href="https://shop.lung.org/ala_shop/shop/home" target=""_blank"">Shop</a></li> <li><a href="/blog">Blog</a></li> <li><a class="notranslate" href="/lung-force">LUNG FORCE</a></li> <li><a href="/help-support">Help & Support</a></li> <li><a href="/signin">Login</a></li> <div style="display: none;"> <li class="userEmail"></li> <li class="userFirstName">Anonymous</li> <li class="userLastName">User></li> <li class="userUsername"></li> </div> </ul> <section class="header-search js-search" role="region" aria-label="search filter"> <div class="sr-only">The following text field filters the results that follow as you type. Use Tab to access the results.</div> <div class="search"> <div id="search-typeahead-header-app"> <div class="results-count sr-only" aria-live="assertive"></div> <app> </app> </div> </div> </section> <div class="header-info"> <button class="header-info-language js-language-modal btn primary-btn translate-btn"> <span>Translate</span> </button> <button class="header-info-location js-location-modal notranslate"> <span class="sr-only">Change Location</span> <span class="icon-location-marker"></span> <span id="location-state-code"></span> </button> </div> </div> </div> </div> <nav class="nav"> <div class="full-width-container"> <div class="header-info"> <div class="header-info-phone"> <a class="js-helpline-modal"><span class="icon-phone-call"></span>Call the Lung HelpLine</a> </div> <div class="header-info-links"> <a href="/support-community/lung-helpline-and-tobacco-quitline"><span class="icon-email"></span>Ask a Question</a> <a href="javascript:void(0)" id="liveagent-chat-link-mobile" class="livechat-link" data-livechat="" style="display: none;"><span class="icon-word-balloon"></span>Live Chat</a> </div> </div> <ul class="primary-nav"> <li class=" ab-test"> <a href="/lung-health-diseases" class="nav-item has-dropdown js-nav-toggle-children"><span>Lung Health & Diseases</span></a> <ul class="nav-megamenu row js-nav-megamenu"> <li><button class="close-toggle js-close-megamenu" type="button"><span class="icon-close"></span><span class="sr-only">Close Megamenu</span></button></li> <li class="col-md-12"><a href="/lung-health-diseases" class="nav-item-header nav-item" data-parent="Lung Health & Diseases" data-navtype="header">Lung Health & Diseases</a></li> <li class=" col-lg-3"> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item has-dropdown " href="/lung-health-diseases/wellness" data-parent="" data-navtype="header">Lung Health & Wellness</a> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item " href="/lung-health-diseases/wellness/protecting-your-lungs" data-parent="" data-navtype="header">Protecting Your Lungs</a> </li> <li class=" "> <a class="nav-item " href="/lung-health-diseases/wellness/vaccines" data-parent="" data-navtype="header">Vaccines</a> </li> <li class=" "> <a class="nav-item " href="/lung-health-diseases/wellness/breathing-exercises" data-parent="" data-navtype="header">Breathing Exercises</a> </li> </ul> </li> <li class=" "> <a class="nav-item has-dropdown " href="/lung-health-diseases/how-lungs-work" data-parent="" data-navtype="header">How Lungs Work</a> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item " href="/lung-health-diseases/how-lungs-work/lung-capacity-and-aging" data-parent="" data-navtype="header">Lung Capacity and Aging</a> </li> </ul> </li> <li class=" "> <a class="nav-item " href="/lung-health-diseases/warning-signs-of-lung-disease" data-parent="" data-navtype="header">Warning Signs of Lung Disease</a> </li> </ul> </li> <li class=" col-lg-3"> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item has-dropdown " href="/lung-health-diseases/lung-disease-lookup" data-parent="" data-navtype="header">Lung Disease Lookup</a> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item " href="/lung-health-diseases/lung-disease-lookup/asthma" data-parent="" data-navtype="header">Asthma</a> </li> <li class=" "> <a class="nav-item " href="/lung-health-diseases/lung-disease-lookup/copd" data-parent="" data-navtype="header">COPD</a> </li> <li class=" "> <a class="nav-item " href="/lung-health-diseases/lung-disease-lookup/covid-19" data-parent="" data-navtype="header">COVID-19</a> </li> <li class=" "> <a class="nav-item " href="/lung-health-diseases/lung-disease-lookup/influenza" data-parent="" data-navtype="header">Flu</a> </li> <li class=" "> <a class="nav-item " href="/lung-health-diseases/lung-disease-lookup/lung-cancer" data-parent="" data-navtype="header">Lung Cancer</a> </li> <li class=" "> <a class="nav-item " href="/lung-health-diseases/lung-disease-lookup/pneumonia" data-parent="" data-navtype="header">Pneumonia</a> </li> <li class=" "> <a class="nav-item " href="/lung-health-diseases/lung-disease-lookup/pulmonary-fibrosis" data-parent="" data-navtype="header">Pulmonary Fibrosis</a> </li> <li class=" view-more"> <a class="nav-item view-more view-more" href="/lung-health-diseases/lung-disease-lookup" data-parent="" data-navtype="header">View More</a> </li> </ul> </li> </ul> </li> <li class=" col-lg-3"> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item has-dropdown " href="/lung-health-diseases/lung-procedures-and-tests" data-parent="" data-navtype="header">Lung Procedures, Tests, & Treatments</a> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item " href="/lung-health-diseases/lung-procedures-and-tests/lung-function-tests" data-parent="" data-navtype="header">Lung Function Tests</a> </li> <li class=" "> <a class="nav-item " href="/lung-health-diseases/lung-procedures-and-tests/ct-scan" data-parent="" data-navtype="header">CT Scan</a> </li> <li class=" "> <a class="nav-item " href="/lung-health-diseases/lung-procedures-and-tests/oxygen-therapy" data-parent="" data-navtype="header">Oxygen Therapy</a> </li> <li class=" "> <a class="nav-item " href="/lung-health-diseases/lung-procedures-and-tests/pulmonary-rehab" data-parent="" data-navtype="header">Pulmonary Rehabilitation</a> </li> <li class=" view-more"> <a class="nav-item view-more view-more" href="/lung-health-diseases/lung-procedures-and-tests" data-parent="" data-navtype="header">View More</a> </li> </ul> </li> <li class=" "> <a class="nav-item " href="/lung-health-diseases/lung-disease-lookup/lung-cancer/saved-by-the-scan" data-parent="" data-navtype="header">Saved By The Scan</a> </li> </ul> </li> <li class=" col-lg-3"> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="menu-card " href="/help-support/patient-caregiver-network" data-parent="" data-navtype="header"> <div class="menu-card-content"> <h3>Join the Patient & Caregiver Network</h3> <p>Whether you are a patient living with lung disease or a caregiver, join the Patient & Caregiver Network for timely education, support and connection. </p> </div> </a> </li> </ul> </li> </ul> </li> <li class=" ab-test"> <a href="/quit-smoking" class="nav-item has-dropdown js-nav-toggle-children"><span>Quit Smoking</span></a> <ul class="nav-megamenu row js-nav-megamenu"> <li><button class="close-toggle js-close-megamenu" type="button"><span class="icon-close"></span><span class="sr-only">Close Megamenu</span></button></li> <li class="col-md-12"><a href="/quit-smoking" class="nav-item-header nav-item" data-parent="Quit Smoking" data-navtype="header">Quit Smoking</a></li> <li class=" col-lg-3"> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item " href="/quit-smoking/help-someone-quit" data-parent="" data-navtype="header">Help Someone Quit</a> </li> <li class=" "> <a class="nav-item has-dropdown " href="/quit-smoking/join-freedom-from-smoking" data-parent="" data-navtype="header">Join Freedom From Smoking</a> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item " href="/quit-smoking/join-freedom-from-smoking/pricing" data-parent="" data-navtype="header">Options and Pricing</a> </li> <li class=" "> <a class="nav-item " href="/quit-smoking/join-freedom-from-smoking/freedom-from-smoking-clinics" data-parent="" data-navtype="header">Group Programs</a> </li> <li class=" "> <a class="nav-item " href="/quit-smoking/join-freedom-from-smoking/become-a-facilitator" data-parent="" data-navtype="header">Facilitator Training</a> </li> </ul> </li> <li class=" "> <a class="nav-item has-dropdown " href="/quit-smoking/i-want-to-quit" data-parent="" data-navtype="header">I Want To Quit</a> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item " href="/quit-smoking/i-want-to-quit/reasons-to-quit-smoking" data-parent="" data-navtype="header">Reasons to Quit</a> </li> <li class=" "> <a class="nav-item " href="/quit-smoking/i-want-to-quit/benefits-of-quitting" data-parent="" data-navtype="header">Benefits of Quitting</a> </li> <li class=" view-more"> <a class="nav-item view-more view-more" href="/quit-smoking/i-want-to-quit" data-parent="" data-navtype="header">View More</a> </li> </ul> </li> </ul> </li> <li class=" col-lg-3"> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item has-dropdown " href="/quit-smoking/helping-teens-quit" data-parent="" data-navtype="header">Help Teens Quit</a> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item " href="/quit-smoking/helping-teens-quit/kids-and-smoking" data-parent="" data-navtype="header">Kids and Smoking</a> </li> <li class=" "> <a class="nav-item " href="/quit-smoking/helping-teens-quit/indepth" data-parent="" data-navtype="header">INDEPTH</a> </li> <li class=" "> <a class="nav-item " href="/quit-smoking/helping-teens-quit/not-on-tobacco" data-parent="" data-navtype="header">Not On Tobacco</a> </li> <li class=" view-more"> <a class="nav-item view-more view-more" href="/quit-smoking/helping-teens-quit" data-parent="" data-navtype="header">View More</a> </li> </ul> </li> <li class=" "> <a class="nav-item has-dropdown " href="/quit-smoking/smoking-facts" data-parent="" data-navtype="header">Smoking Facts</a> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item " href="/quit-smoking/smoking-facts/health-effects/smoking" data-parent="" data-navtype="header">Health Effects of Smoking</a> </li> <li class=" "> <a class="nav-item " href="/quit-smoking/smoking-facts/health-effects/secondhand-smoke" data-parent="" data-navtype="header">Secondhand Smoke</a> </li> <li class=" "> <a class="nav-item " href="/quit-smoking/smoking-facts/whats-in-a-cigarette" data-parent="" data-navtype="header">What's in a Cigarette?</a> </li> <li class=" view-more"> <a class="nav-item view-more view-more" href="/quit-smoking/smoking-facts" data-parent="" data-navtype="header">View More</a> </li> </ul> </li> </ul> </li> <li class=" col-lg-3"> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item has-dropdown " href="/quit-smoking/e-cigarettes-vaping" data-parent="" data-navtype="header">E-Cigarettes and Vaping</a> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item " href="/quit-smoking/e-cigarettes-vaping/lung-health" data-parent="" data-navtype="header">E-Cigarettes and Lung Health</a> </li> <li class=" "> <a class="nav-item " href="/quit-smoking/e-cigarettes-vaping/whats-in-an-e-cigarette" data-parent="" data-navtype="header">What's in an E-Cigarette</a> </li> <li class=" "> <a class="nav-item " href="/quit-smoking/e-cigarettes-vaping/impact-of-e-cigarettes-on-lung" data-parent="" data-navtype="header">The Impact of E-Cigarettes on the Lung</a> </li> <li class=" view-more"> <a class="nav-item view-more view-more" href="/quit-smoking/e-cigarettes-vaping" data-parent="" data-navtype="header">View More</a> </li> </ul> </li> <li class=" "> <a class="nav-item has-dropdown " href="/quit-smoking/helping-teens-quit/talk-about-vaping" data-parent="" data-navtype="header">Talk About Vaping</a> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item " href="/quit-smoking/helping-teens-quit/talk-about-vaping/conversation-guide" data-parent="" data-navtype="header">Vaping Conversation Guide</a> </li> <li class=" "> <a class="nav-item " href="/quit-smoking/helping-teens-quit/talk-about-vaping/vaping-facts" data-parent="" data-navtype="header">Vaping Facts</a> </li> <li class=" view-more"> <a class="nav-item view-more view-more" href="/quit-smoking/helping-teens-quit/talk-about-vaping" data-parent="" data-navtype="header">View More</a> </li> </ul> </li> </ul> </li> <li class=" col-lg-3"> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="menu-card " href="/quit-smoking/smoking-facts/how-to-help-people-quit" data-parent="" data-navtype="header"> <div class="menu-card-content"> <h3>How to Help People Quit</h3> <p>Become a navigator of the tobacco cessation process through this free, one-hour online course.</p> </div> </a> </li> </ul> </li> </ul> </li> <li class=" active ab-test"> <a href="/clean-air" class="nav-item has-dropdown js-nav-toggle-children"><span>Clean Air</span></a> <ul class="nav-megamenu row js-nav-megamenu"> <li><button class="close-toggle js-close-megamenu" type="button"><span class="icon-close"></span><span class="sr-only">Close Megamenu</span></button></li> <li class="col-md-12"><a href="/clean-air" class="nav-item-header nav-item" data-parent="Clean Air" data-navtype="header">Clean Air</a></li> <li class=" col-lg-3"> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item has-dropdown " href="/clean-air/indoor-air/building-type-air-resources/at-home" data-parent="" data-navtype="header">Clean Air at Home</a> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item " href="/clean-air/indoor-air/signs-unhealthy-indoor-air" data-parent="" data-navtype="header">How to Know if Your Air is Unhealthy</a> </li> <li class=" "> <a class="nav-item " href="/clean-air/indoor-air/protecting-from-air-pollution" data-parent="" data-navtype="header">Keep Pollution Out of Your Home</a> </li> </ul> </li> <li class=" "> <a class="nav-item has-dropdown " href="/clean-air/indoor-air/indoor-air-pollutants" data-parent="" data-navtype="header">Indoor Air Pollutants & Health</a> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item " href="/clean-air/indoor-air/indoor-air-pollutants/radon" data-parent="" data-navtype="header">Radon</a> </li> <li class=" "> <a class="nav-item " href="/clean-air/indoor-air/indoor-air-pollutants/cleaning-supplies-household-chem" data-parent="" data-navtype="header">Cleaning Supplies and Household Chemicals</a> </li> <li class=" "> <a class="nav-item " href="/clean-air/indoor-air/indoor-air-pollutants/dust-mites" data-parent="" data-navtype="header">Dust Mites and Dust</a> </li> <li class=" view-more"> <a class="nav-item view-more view-more" href="/clean-air/indoor-air/indoor-air-pollutants" data-parent="" data-navtype="header">View More</a> </li> </ul> </li> </ul> </li> <li class=" col-lg-3"> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item has-dropdown " href="/clean-air/indoor-air/building-type-air-resources/at-school" data-parent="" data-navtype="header">Clean Air at School</a> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item " href="/clean-air/indoor-air/building-type-air-resources/at-school/healthy-air-tools-for-schools" data-parent="" data-navtype="header">Tools for Schools & Districts</a> </li> </ul> </li> <li class=" "> <a class="nav-item " href="/clean-air/at-work" data-parent="" data-navtype="header">Clean Air at Work</a> </li> <li class=" "> <a class="nav-item has-dropdown " href="/clean-air/outdoors/what-makes-air-unhealthy" data-parent="" data-navtype="header">What Makes Outdoor Air Unhealthy</a> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item " href="/clean-air/outdoors/what-makes-air-unhealthy/ozone" data-parent="" data-navtype="header">Ozone</a> </li> <li class=" "> <a class="nav-item " href="/clean-air/outdoors/what-makes-air-unhealthy/particle-pollution" data-parent="" data-navtype="header">Particle Pollution</a> </li> <li class=" "> <a class="nav-item " href="/clean-air/outdoors/what-makes-air-unhealthy/toxic-air-pollutants" data-parent="" data-navtype="header">Toxic Air Pollutants</a> </li> <li class=" view-more"> <a class="nav-item view-more view-more" href="/clean-air/outdoors/what-makes-air-unhealthy" data-parent="" data-navtype="header">View More</a> </li> </ul> </li> </ul> </li> <li class=" col-lg-3"> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item has-dropdown " href="/clean-air/outdoors" data-parent="" data-navtype="header">Clean Air Outdoors</a> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item " href="/clean-air/outdoors/air-quality-index" data-parent="" data-navtype="header">Air Quality Index</a> </li> </ul> </li> <li class=" "> <a class="nav-item has-dropdown " href="/clean-air/emergencies-and-natural-disasters" data-parent="" data-navtype="header">Emergencies & Disasters</a> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item " href="/clean-air/emergencies-and-natural-disasters/wildfires" data-parent="" data-navtype="header">Wildfires</a> </li> </ul> </li> <li class=" "> <a class="nav-item " href="/clean-air/climate-change" data-parent="" data-navtype="header">Climate Change</a> </li> <li class=" "> <a class="nav-item " href="/clean-air/electric-vehicle-report" data-parent="" data-navtype="header">Electric Vehicles</a> </li> </ul> </li> <li class=" col-lg-3"> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="menu-card " href="/clean-air/outdoors/10-tips-to-protect-yourself" data-parent="" data-navtype="header"> <div class="menu-card-content"> <h3>10 Tips to Protect Yourself from Unhealthy Air</h3> <p>Read our simple and effective tips for protecting you and your family from the dangers of air pollution.</p> </div> </a> </li> </ul> </li> </ul> </li> <li class=" ab-test"> <a href="/research" class="nav-item has-dropdown js-nav-toggle-children"><span>Research & Reports</span></a> <ul class="nav-megamenu row js-nav-megamenu"> <li><button class="close-toggle js-close-megamenu" type="button"><span class="icon-close"></span><span class="sr-only">Close Megamenu</span></button></li> <li class="col-md-12"><a href="/research" class="nav-item-header nav-item" data-parent="Research & Reports" data-navtype="header">Research & Reports</a></li> <li class=" col-lg-3"> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item has-dropdown " href="/research/about-our-research" data-parent="" data-navtype="header">About Our Research</a> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item " href="/research/about-our-research/research-partnerships" data-parent="" data-navtype="header">Research Partnerships</a> </li> </ul> </li> <li class=" "> <a class="nav-item has-dropdown " href="/research/airways-clinical-research-centers" data-parent="" data-navtype="header">Airways Clinical Research Centers</a> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item " href="/research/airways-clinical-research-centers/locations" data-parent="" data-navtype="header">Locations</a> </li> <li class=" "> <a class="nav-item " href="/research/airways-clinical-research-centers/outcomes" data-parent="" data-navtype="header">Research Outcomes</a> </li> </ul> </li> <li class=" "> <a class="nav-item " href="/research/awards-and-grants-opportunities" data-parent="" data-navtype="header">Awards and Grants Opportunities</a> </li> </ul> </li> <li class=" col-lg-3"> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item " href="/research/about-our-research/meet-the-researchers" data-parent="" data-navtype="header">Meet the Researchers</a> </li> <li class=" "> <a class="nav-item has-dropdown " href="/research/clinical-trials" data-parent="" data-navtype="header">Clinical Trials</a> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item " href="/research/clinical-trials/find-a-clinical-trial" data-parent="" data-navtype="header">Find a Clinical Trial</a> </li> </ul> </li> <li class=" "> <a class="nav-item " href="/research/trends-in-lung-disease" data-parent="" data-navtype="header">Trends in Lung Disease</a> </li> <li class=" "> <a class="nav-item has-dropdown " href="/research/state-of-lung-cancer" data-parent="" data-navtype="header">State of Lung Cancer Report</a> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item " href="/research/state-of-lung-cancer/key-findings" data-parent="" data-navtype="header">Key Findings</a> </li> <li class=" "> <a class="nav-item " href="/research/state-of-lung-cancer/states" data-parent="" data-navtype="header">State Rankings</a> </li> </ul> </li> </ul> </li> <li class=" col-lg-3"> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item has-dropdown " href="/research/sota" data-parent="" data-navtype="header">State of the Air Report</a> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item " href="/research/sota/key-findings" data-parent="" data-navtype="header">Key Findings</a> </li> <li class=" "> <a class="nav-item " href="/research/sota/city-rankings/" data-parent="" data-navtype="header">Report Cards</a> </li> </ul> </li> <li class=" "> <a class="nav-item has-dropdown " href="/research/sotc" data-parent="" data-navtype="header">State of Tobacco Control Report</a> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item " href="/research/sotc/key-findings" data-parent="" data-navtype="header">Key Findings</a> </li> <li class=" "> <a class="nav-item " href="/research/sotc/state-grades" data-parent="" data-navtype="header">State Grades</a> </li> </ul> </li> </ul> </li> <li class=" col-lg-3"> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="menu-card " href="/research/sota/key-findings" data-parent="" data-navtype="header"> <div class="menu-card-content"> <h3>State of the Air Key Findings</h3> <p>Our key findings add to the evidence that a changing climate is making it harder to protect human health.</p> </div> </a> </li> </ul> </li> </ul> </li> <li class=" ab-test"> <a href="/policy-advocacy" class="nav-item has-dropdown js-nav-toggle-children"><span>Policy & Advocacy</span></a> <ul class="nav-megamenu row js-nav-megamenu"> <li><button class="close-toggle js-close-megamenu" type="button"><span class="icon-close"></span><span class="sr-only">Close Megamenu</span></button></li> <li class="col-md-12"><a href="/policy-advocacy" class="nav-item-header nav-item" data-parent="Policy & Advocacy" data-navtype="header">Policy & Advocacy</a></li> <li class=" col-lg-3"> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item " href="/policy-advocacy/our-victories" data-parent="" data-navtype="header">Our Advocacy Victories</a> </li> <li class=" "> <a class="nav-item has-dropdown " href="/policy-advocacy/take-action" data-parent="" data-navtype="header">Take Action</a> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item " href="/policy-advocacy/take-action/lung-action-network" data-parent="" data-navtype="header">Join the Lung Action Network</a> </li> <li class=" "> <a class="nav-item " href="/policy-advocacy/take-action/action-alerts" data-parent="" data-navtype="header">Alerts & Petitions</a> </li> <li class=" view-more"> <a class="nav-item view-more view-more" href="/policy-advocacy/take-action" data-parent="" data-navtype="header">View More</a> </li> </ul> </li> <li class=" "> <a class="nav-item " href="/policy-advocacy/public-policy-agenda" data-parent="" data-navtype="header">Public Policy Agenda</a> </li> <li class=" "> <a class="nav-item " href="/policy-advocacy/advocacy-archive" data-parent="" data-navtype="header">Advocacy Archive</a> </li> </ul> </li> <li class=" col-lg-3"> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item has-dropdown " href="/policy-advocacy/healthcare-lung-disease" data-parent="" data-navtype="header">Healthcare & Lung Disease Initiatives</a> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item " href="/policy-advocacy/healthcare-lung-disease/asthma-policy" data-parent="" data-navtype="header">Asthma Policy & Advocacy</a> </li> <li class=" "> <a class="nav-item " href="/policy-advocacy/healthcare-lung-disease/lung-cancer-policy" data-parent="" data-navtype="header">Lung Cancer Policy & Advocacy</a> </li> <li class=" "> <a class="nav-item " href="/policy-advocacy/healthcare-lung-disease/healthcare-policy" data-parent="" data-navtype="header">Healthcare Policy & Advocacy</a> </li> </ul> </li> <li class=" "> <a class="nav-item has-dropdown " href="/policy-advocacy/healthy-air-campaign" data-parent="" data-navtype="header">Healthy Air Campaign</a> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item " href="/policy-advocacy/healthy-air-campaign/about-healthy-air-campaign" data-parent="" data-navtype="header">About the Campaign</a> </li> <li class=" "> <a class="nav-item " href="/policy-advocacy/healthy-air-campaign/share-your-story" data-parent="" data-navtype="header">Share Your Story</a> </li> <li class=" "> <a class="nav-item " href="/policy-advocacy/healthy-air-campaign/health-pros-clean-air-climate" data-parent="" data-navtype="header">Health Professionals for Clean Air and Climate Action</a> </li> <li class=" view-more"> <a class="nav-item view-more view-more" href="/policy-advocacy/healthy-air-campaign" data-parent="" data-navtype="header">View More</a> </li> </ul> </li> </ul> </li> <li class=" col-lg-3"> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item has-dropdown " href="/policy-advocacy/tobacco" data-parent="" data-navtype="header">Tobacco Initiatives</a> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item " href="/policy-advocacy/tobacco/cessation" data-parent="" data-navtype="header">Tobacco Cessation</a> </li> <li class=" "> <a class="nav-item " href="/policy-advocacy/tobacco/smokefree-environments" data-parent="" data-navtype="header">Smokefree Environments</a> </li> <li class=" "> <a class="nav-item " href="/policy-advocacy/tobacco/prevention" data-parent="" data-navtype="header">Tobacco Prevention</a> </li> <li class=" view-more"> <a class="nav-item view-more view-more" href="/policy-advocacy/tobacco" data-parent="" data-navtype="header">View More</a> </li> </ul> </li> <li class=" "> <a class="nav-item " href="/policy-advocacy/tobacco/slati" data-parent="" data-navtype="header">State Legislated Actions on Tobacco Issues (SLATI)</a> </li> </ul> </li> <li class=" col-lg-3"> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="menu-card " href="/policy-advocacy/take-action" data-parent="" data-navtype="header"> <img alt="" class="js-lazy js-webp" data-image="/optimize/getmedia/20714752-fa29-4311-bdf7-d611f280134b/getinvolved_menu.jpg?format=webp" data-image-webp="/optimize/getmedia/20714752-fa29-4311-bdf7-d611f280134b/getinvolved_menu.jpg?format=webp"> <div class="menu-card-content"> <h3>Become an Advocate</h3> <p>Share your voice and advocate for policies that will save lives.</p> </div> </a> </li> </ul> </li> </ul> </li> <li class=" ab-test"> <a href="/get-involved" class="nav-item has-dropdown js-nav-toggle-children"><span>Get Involved</span></a> <ul class="nav-megamenu row js-nav-megamenu"> <li><button class="close-toggle js-close-megamenu" type="button"><span class="icon-close"></span><span class="sr-only">Close Megamenu</span></button></li> <li class="col-md-12"><a href="/get-involved" class="nav-item-header nav-item" data-parent="Get Involved" data-navtype="header">Get Involved</a></li> <li class=" col-lg-3"> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item has-dropdown " href="/get-involved/events" data-parent="" data-navtype="header">Events</a> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item " href="/get-involved/events/fight-for-air-climbs" data-parent="" data-navtype="header">Fight For Air Climbs</a> </li> <li class=" "> <a class="nav-item " href="/get-involved/events/lung-force-run-walks" data-parent="" data-navtype="header">LUNG FORCE Walks/Runs</a> </li> <li class=" "> <a class="nav-item " href="/get-involved/events/cycle-for-air" data-parent="" data-navtype="header">Cycle For Air</a> </li> <li class=" "> <a class="nav-item " href="/get-involved/events/galas" data-parent="" data-navtype="header">Galas & Social Events</a> </li> <li class=" "> <a class="nav-item " href="/quit-smoking/join-freedom-from-smoking/freedom-from-smoking-clinics" data-parent="" data-navtype="header">Freedom From Smoking® Clinics</a> </li> <li class=" "> <a class="nav-item " href="/help-support/better-breathers-club" data-parent="" data-navtype="header">Better Breathers Clubs</a> </li> <li class=" "> <a class="nav-item " href="/help-support/education-programs" data-parent="" data-navtype="header">Education & Training</a> </li> <li class=" view-more"> <a class="nav-item view-more view-more" href="/get-involved/events/find-an-event?category=all-events,stair-climb,runwalk,cycling-event,gala,educationtraining,RecurringEvent" data-parent="" data-navtype="header">View All Events</a> </li> </ul> </li> </ul> </li> <li class=" col-lg-3"> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item " href="/professional-education/training-certification" data-parent="" data-navtype="header">Become a Facilitator or Educator</a> </li> <li class=" "> <a class="nav-item has-dropdown " href="/policy-advocacy/take-action" data-parent="" data-navtype="header">Become an Advocate</a> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item " href="/policy-advocacy/take-action/action-alerts" data-parent="" data-navtype="header">Alerts & Petitions</a> </li> <li class=" "> <a class="nav-item " href="/policy-advocacy/take-action/lung-action-network" data-parent="" data-navtype="header">Join the Lung Action Network</a> </li> </ul> </li> <li class=" "> <a class="nav-item has-dropdown " href="/get-involved/shared-stories" data-parent="" data-navtype="header">Shared Stories</a> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item " href="/get-involved/share-your-story" data-parent="" data-navtype="header">Share Your Story</a> </li> </ul> </li> </ul> </li> <li class=" col-lg-3"> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item " href="/about-us/email-sign-up" data-parent="" data-navtype="header">Sign Up for Email</a> </li> <li class=" "> <a class="nav-item " href="/get-involved/volunteer" data-parent="" data-navtype="header">Volunteer</a> </li> <li class=" "> <a class="nav-item " href="/get-involved/ways-to-give" data-parent="" data-navtype="header">Ways to Give</a> </li> <li class=" "> <a class="nav-item " href="/get-involved/ways-to-give/diy" data-parent="" data-navtype="header">DIY Fundraising</a> </li> <li class=" "> <a class="nav-item " href="/get-involved/youth-empowerment" data-parent="" data-navtype="header">Youth & Young Adults In Action</a> </li> </ul> </li> <li class=" col-lg-3"> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="menu-card " href="/get-involved/events/fight-for-air-climbs" data-parent="" data-navtype="header"> <img alt="" class="js-lazy js-webp" data-image="/optimize/getmedia/f95d43a1-f9e1-43c2-ab0f-fc20abaadb4a/ffac23-cm.jpg?format=webp" data-image-webp="/optimize/getmedia/f95d43a1-f9e1-43c2-ab0f-fc20abaadb4a/ffac23-cm.jpg?format=webp"> <div class="menu-card-content"> <h3>Join a Fight For Air Climb</h3> <p>Step up for lung health by participating in a Fight For Air Climb event near you. Save your spot on the stairs today!</p> </div> </a> </li> </ul> </li> </ul> </li> <li class=" ab-test"> <a href="/get-involved/ways-to-give" class="nav-item has-dropdown js-nav-toggle-children"><span>Ways to Give</span></a> <ul class="nav-megamenu row js-nav-megamenu"> <li><button class="close-toggle js-close-megamenu" type="button"><span class="icon-close"></span><span class="sr-only">Close Megamenu</span></button></li> <li class="col-md-12"><a href="/get-involved/ways-to-give" class="nav-item-header nav-item" data-parent="Ways to Give" data-navtype="header">Ways to Give</a></li> <li class=" col-lg-3"> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item has-dropdown " href="https://action.lung.org/site/Donation2?df_id=31271&mfc_pref=T&31271.donation=form1" data-parent="" data-navtype="header">Donate Today</a> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item " href="https://action.lung.org/site/Donation2?df_id=31271&mfc_pref=T&31271.donation=form1" data-parent="" data-navtype="header">One-Time Gift</a> </li> <li class=" "> <a class="nav-item " href="https://action.lung.org/site/Donation2?df_id=31270&mfc_pref=T&31270.donation=form1" data-parent="" data-navtype="header">Monthly</a> </li> <li class=" "> <a class="nav-item " href="https://action.lung.org/site/Donation2?df_id=31272&mfc_pref=T&31272.donation=form1" data-parent="" data-navtype="header">Honor & Memorial</a> </li> </ul> </li> <li class=" "> <a class="nav-item has-dropdown " href="https://legacy.lung.org/" data-parent="" data-navtype="header">Legacy Giving</a> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item " href="https://legacy.lung.org/gifts-of-securities" data-parent="" data-navtype="header">Gifts of Stock</a> </li> <li class=" "> <a class="nav-item " href="https://legacy.lung.org/gifts-from-donor-advised-funds" data-parent="" data-navtype="header">Donor Advised Funds</a> </li> <li class=" "> <a class="nav-item " href="https://legacy.lung.org/gifts-that-make-an-impact-now" data-parent="" data-navtype="header">Retirement Plans</a> </li> <li class=" view-more"> <a class="nav-item view-more view-more" href="https://legacy.lung.org" data-parent="" data-navtype="header">View More</a> </li> </ul> </li> </ul> </li> <li class=" col-lg-3"> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item has-dropdown " href="/get-involved/ways-to-give/why-support" data-parent="" data-navtype="header">Why Give</a> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item " href="/get-involved/ways-to-give/donation-faq" data-parent="" data-navtype="header">Donor FAQs</a> </li> <li class=" "> <a class="nav-item " href="/get-involved/ways-to-give/donate-monthly" data-parent="" data-navtype="header">Reasons to Be a Monthly Donor</a> </li> </ul> </li> <li class=" "> <a class="nav-item " href="/get-involved/ways-to-give/vehicle-donation-program" data-parent="" data-navtype="header">Donate a Car</a> </li> <li class=" "> <a class="nav-item " href="/get-involved/ways-to-give/christmas-seals" data-parent="" data-navtype="header">Christmas Seals®</a> </li> <li class=" "> <a class="nav-item " href="/get-involved/ways-to-give/lung-love/shop-and-give-back" data-parent="" data-navtype="header">Shop & Give Back</a> </li> </ul> </li> <li class=" col-lg-3"> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item " href="/get-involved/ways-to-give/sponsors-and-supporters" data-parent="" data-navtype="header">Corporate Support</a> </li> <li class=" "> <a class="nav-item has-dropdown " href="/get-involved/ways-to-give/diy" data-parent="" data-navtype="header">Start a Fundraiser (DIY)</a> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="nav-item external " href="https://smashthestats.funraise.org/" target=""_blank"" data-parent="" data-navtype="header">SMASH the Stats</a> </li> <li class=" "> <a class="nav-item external " href="https://bealungsaver.funraise.org/" target=""_blank"" data-parent="" data-navtype="header">Be a Lung-Saver</a> </li> <li class=" "> <a class="nav-item external " href="https://poweredbylungs.funraise.org/" target=""_blank"" data-parent="" data-navtype="header">Powered By Lungs</a> </li> <li class=" "> <a class="nav-item external " href="https://tiltify.com/american-lung-association" target=""_blank"" data-parent="" data-navtype="header">Livestream for Lungs</a> </li> <li class=" view-more"> <a class="nav-item view-more view-more" href="/get-involved/ways-to-give/diy" data-parent="" data-navtype="header">View More</a> </li> </ul> </li> <li class=" "> <a class="nav-item external " href="https://wallofremembrance.funraise.org/" target=""_blank"" data-parent="" data-navtype="header">Create a Memorial Wall</a> </li> </ul> </li> <li class=" col-lg-3"> <ul class="primary-nav-submenu js-nav-dropdown-toggle"> <li class=" "> <a class="menu-card " href="/get-involved/ways-to-give/matching-gifts" data-parent="" data-navtype="header"> <div class="menu-card-content"> <h3>Double Your Gift</h3> <p>Matching gifts are a great way to stretch your donation. Check to see if your donation is eligible. </p> </div> </a> </li> </ul> </li> </ul> </li> <li class="menu-item-cta"> <a id="donateBtn" href="/donate" class="header-donate btn secondary-btn homeDonateBtn">Donate</a> </li> </ul> <ul class="nav-utilities"> <li> <div class="nav-location"> Location: <span class="mobile-location-info notranslate"></span> <a href="#" class="js-location-modal">Update</a> </div> </li> <li><a href="https://shop.lung.org/ala_shop/shop/home" class="external" target=""_blank"">Shop</a></li> <li><a href="/blog" class="">Blog</a></li> <li><a class="notranslate" href="/lung-force">LUNG FORCE</a></li> <li><a href="/help-support" class="">Help & Support</a></li> <li><a href="/signin">Login</a></li> <li> <div class="nav-language"> <a href="#" class="js-language-modal btn primary-btn translate-btn mobile">Translate</a> </div> </li> </ul> </div> </nav> </header> <main id="main" class="main" data-swiftype-name="body" data-swiftype-type="text"> <div class="breadcrumbs" aria-label="Breadcrumb"> <div class="global-container">  <ol class="breadcrumbs-nav"> <li><a href="/">Home</a></li> <li class="ALA.CategoryOverview"><a href="/clean-air">Clean Air</a></li> <li class="ALA.CustomLandingWithTabs"><a href="/clean-air/indoor-air">Clean Air Indoors</a></li> <li class="ALA.GeneralContent"><a href="/clean-air/indoor-air/indoor-air-pollutants">What Makes Indoor Air Unhealthy?</a></li> </ol> </div> </div> <style>.responsive-image_hero { background-image: url( '/optimize/getmedia/d6ef3e19-fb63-48e6-807b-d854087533e1/mold_768x512_AM.jpg?width=768&height=512&ext=.jpg&format=webp' ); } @media screen and (min-width: 750px), (orientation: landscape) { .responsive-image_hero { background-image: url( '/optimize/getmedia/e215d396-3648-4181-9ab6-38ef73aaff81/mold_1200x800_D.jpg?width=1200&height=800&ext=.jpg&format=webp' ); } }</style> <section class="bg-primary promo promo-hero tablet-middle-top-left-corner top-right-corner-mobile general-content-hero"> <div class="promo-card"> <div class="global-container"> <div class="promo-card-content"> <div class="promo-card-content-wrap"> <h1>What Makes Indoor Air Unhealthy?</h1> Learn about indoor air pollutants and sources of indoor air pollution. </div> <ul class="social-icons a2a_kit a2a_kit_size_32 a2a_default_style"> <li> <a href="#" class="social icon-facebook a2a_button_facebook"> <span class="sr-only">Facebook</span> </a> </li> <li> <a class="social icon-twitter a2a_button_twitter"> <span class="sr-only">Twitter</span> </a> </li> <li> <a class="social icon-linkedin a2a_button_linkedin"> <span class="sr-only">LinkedIn</span> </a> </li> <li> <a class="social icon-email a2a_button_email"> <span class="sr-only">Email</span> </a> </li> <li> <a class="social icon-print a2a_button_print"> <span class="sr-only">Print</span> </a> </li> </ul> </div> </div> <div class="promo-card-img corner-img responsive-image_hero "> </div> </div> </section> <section class="section bg-white "> <div class="global-container "> <div class="row"> <div class="col-lg-3"> <div class="side-menu-wrap"> <button class="btn primary-btn js-toggle-side-menu hide-desktop" type="button">Section Menu <span class="icon-angle-down"></span></button> <aside class="side-menu js-side-menu"> <a href="/clean-air"> <h3 class="side-menu-heading">Clean Air</h3> </a> <ul class="side-menu-primary "> <li class=" "> <a href="/clean-air/indoor-air">Clean Air Indoors</a> <ul class="side-menu-submenu"> <li class=" "> <a href="/clean-air/indoor-air/signs-unhealthy-indoor-air">Signs of Unhealthy Indoor Air</a> </li> <script> </script> <li class="active "> <a href="/clean-air/indoor-air/indoor-air-pollutants">What Makes Indoor Air Unhealthy?</a> <ul class="side-menu-submenu"> <li class=" "> <a href="/clean-air/indoor-air/indoor-air-pollutants/dust-briefing">Dust & Indoor Air Quality Briefing</a> </li> <script> </script> <li class=" "> <a href="/clean-air/indoor-air/indoor-air-pollutants/asbestos">Asbestos</a> </li> <script> </script> <li class=" "> <a href="/clean-air/indoor-air/indoor-air-pollutants/building-paint-products">Building and Paint Products</a> </li> <script> </script> <li class=" "> <a href="/clean-air/indoor-air/indoor-air-pollutants/carbon-monoxide">Carbon Monoxide</a> </li> <script> </script> <li class=" "> <a href="/clean-air/indoor-air/indoor-air-pollutants/carpets">Carpets and Rugs</a> </li> <script> </script> <li class=" "> <a href="/clean-air/indoor-air/indoor-air-pollutants/cleaning-supplies-household-chem">Cleaning Supplies and Household Chemicals</a> </li> <script> </script> <li class=" "> <a href="/clean-air/indoor-air/indoor-air-pollutants/cockroaches">Cockroaches</a> </li> <script> </script> <li class=" "> <a href="/clean-air/indoor-air/indoor-air-pollutants/dust-mites">Dust Mites</a> </li> <script> </script> <li class=" "> <a href="/clean-air/indoor-air/indoor-air-pollutants/formaldehyde">Formaldehyde</a> </li> <script> </script> <li class=" "> <a href="/clean-air/indoor-air/indoor-air-pollutants/lead">Lead</a> </li> <script> </script> <li class=" "> <a href="/clean-air/indoor-air/indoor-air-pollutants/mold">Mold</a> </li> <script> </script> <li class=" "> <a href="/clean-air/indoor-air/indoor-air-pollutants/particulate-matter">Particulate Matter</a> </li> <script> </script> <li class=" "> <a href="/clean-air/indoor-air/indoor-air-pollutants/pet-dander">Pet Dander</a> </li> <script> </script> <li class=" "> <a href="/clean-air/indoor-air/indoor-air-pollutants/radon">Radon</a> </li> <script> </script> <li class=" "> <a href="/clean-air/indoor-air/indoor-air-pollutants/residential-wood-burning">Residential Wood Burning</a> </li> <script> </script> <li class=" "> <a href="/clean-air/indoor-air/indoor-air-pollutants/volatile-organic-compounds">Volatile Organic Compounds</a> </li> <script> </script> </ul> </li> <script> </script> <li class=" "> <a href="/clean-air/indoor-air/protecting-from-air-pollution">Protect Yourself from Indoor Air Pollution</a> </li> <script> </script> <li class=" "> <a href="/clean-air/indoor-air/building-type-air-resources">Indoor Air at Home, Work and School</a> </li> <script> </script> </ul> </li> <script> </script> <li class=" "> <a href="/clean-air/outdoors">Clean Air Outdoors</a> </li> <script> </script> <li class=" "> <a href="/clean-air/climate-change">Climate Change</a> </li> <script> </script> <li class=" "> <a href="/clean-air/electric-vehicle-report">Electric Vehicle Reports</a> </li> <script> </script> <li class=" "> <a href="/clean-air/emergencies-and-natural-disasters">Emergencies & Disasters</a> </li> <script> </script> <li class=" "> <a href="/clean-air/stand-up-for-clean-air">Stand Up For Clean Air Initiative</a> </li> <script> </script> </ul> </aside> </div> </div> <div class="section-general-content col-lg-9 section-general-content-body"> <section class=" " style="" id="section_7c616edf5a2f"> <div class="global-container"> <div class="row "> <div class="col-12"> <div class="fr-view"> <p>Poor indoor air quality can cause or contribute to the development of infections, lung cancer and chronic lung diseases such as asthma. People who already have lung disease are at greater risk. Find out what makes indoor air unhealthy and how pollution can hurt your body.</p> </div> </div> </div> </div> </section> <section class=" no-padding cards--grid margin-bottom" style="" id="section_51dc6fc0f857"> <div class="global-container"> <div class="row "> <div class="col-md-6"> <div id="promo-ahlt3rddf2j" class="icon-cta-card card-symbol card widget bg-white position-up icon-size-small "> <div class="card-content"> <span class="card-icon icon-city"></span> <h2 class="card-title no-margin">Building Construction and Furnishings </h2> <div class="card-summary no-margin-bottom"> <p style="text-align: left">Some construction processes and products, like paint and carpets, can make the air we breathe indoors unhealthy. Learn about the harmful pollutants found in building construction and furnishings.</p><ul><li style="text-align: left"><a href="/clean-air/indoor-air/indoor-air-pollutants/asbestos">Asbestos</a></li><li style="text-align: left"><a href="/clean-air/indoor-air/indoor-air-pollutants/building-paint-products">Building and Paint Products</a></li><li style="text-align: left"><a href="/clean-air/indoor-air/indoor-air-pollutants/carpets">Carpets and Rugs</a></li><li style="text-align: left"><a href="/clean-air/indoor-air/indoor-air-pollutants/formaldehyde">Formaldehyde</a></li><li style="text-align: left"><a href="/clean-air/indoor-air/indoor-air-pollutants/lead">Lead</a></li></ul> </div> </div> </div> </div> <div class="col-md-6"> <div id="promo-ovrbyx5au0m" class="icon-cta-card card-symbol card widget bg-white position-up icon-size-small "> <div class="card-content"> <span class="card-icon icon-burner"></span> <h2 class="card-title no-margin">Fuel-Burning Appliances </h2> <div class="card-summary no-margin-bottom"> <p style="text-align: left">Fuel-burning appliances including cooking stoves, furnaces and water heaters can create emissions that are harmful to our health and the environment.</p><ul><li style="text-align: left"><a href="/clean-air/indoor-air/indoor-air-pollutants/carbon-monoxide">Carbon Monoxide</a></li><li style="text-align: left"><a href="/clean-air/outdoors/what-makes-air-unhealthy/nitrogen-dioxide">Nitrogen Dioxide</a></li><li style="text-align: left"><a href="/clean-air/indoor-air/indoor-air-pollutants/particulate-matter">Particulate Matter</a></li><li style="text-align: left"><a href="/clean-air/indoor-air/indoor-air-pollutants/residential-wood-burning">Residential Wood Burning</a></li></ul><p>Learn more about the <a href="/policy-advocacy/healthy-air-campaign/healthy-efficient-homes/residential-combustion">health impacts of combustion</a> in homes.</p> </div> </div> </div> </div> </div> </div> </section> <section class=" no-padding cards--grid margin-bottom" style="" id="section_efbb6e02089f"> <div class="global-container"> <div class="row "> <div class="col-md-6"> <div id="promo-zpucw4mlqiw" class="icon-cta-card card-symbol card widget bg-white position-up icon-size-small "> <div class="card-content"> <span class="card-icon icon-moisture"></span> <h2 class="card-title no-margin">Moisture and Water </h2> <div class="card-summary no-margin-bottom"> <p style="text-align: left">Excessive moisture indoors can cause mold problems and can also promotes the growth of dust mites, cockroaches, bacteria and viruses, which can impact health. Learn about the sources of moisture, how mold grows, and how to protect your health.</p><ul><li><a href="/clean-air/indoor-air/indoor-air-pollutants/mold">Mold</a></li><li style="text-align: left"><a href="/clean-air/emergencies-and-natural-disasters/floods-and-water-damage">Floods and Water Damage</a><a href="/clean-air/indoor-air/indoor-air-pollutants/mold"></a></li></ul> </div> </div> </div> </div> <div class="col-md-6"> <div id="promo-zn5m5bmq4e0" class="icon-cta-card card-symbol card widget bg-white position-up icon-size-small "> <div class="card-content"> <span class="card-icon icon-house"></span> <h2 class="card-title no-margin">Occupancy</h2> <div class="card-summary no-margin-bottom"> <p style="text-align: left">People and their activities can create indoor air pollution that can lead to poor health.</p><ul><li style="text-align: left"><a href="/clean-air/indoor-air/indoor-air-pollutants/cockroaches">Cockroaches</a></li><li style="text-align: left"><a href="/clean-air/indoor-air/indoor-air-pollutants/dust-mites">Dust and Dust Mites</a></li><li style="text-align: left"><a href="/clean-air/indoor-air/indoor-air-pollutants/pet-dander">Pet Dander</a></li><li style="text-align: left"><a href="/quit-smoking/smoking-facts/health-effects/secondhand-smoke">Secondhand Smoke</a></li><li id="isPasted" style="text-align: left"><a href="/clean-air/indoor-air/indoor-air-pollutants/particulate-matter">Particulate Matter</a></li><li style="text-align: left"><a href="/clean-air/indoor-air/indoor-air-pollutants/volatile-organic-compounds">Volatile Organic Compounds</a></li></ul> </div> </div> </div> </div> </div> </div> </section> <section class=" no-padding cards--grid margin-bottom" style="" id="section_a865057d965b"> <div class="global-container"> <div class="row "> <div class="col-md-6"> <div id="promo-gyfuha22ha1" class="icon-cta-card card-symbol card widget bg-white position-up icon-size-small "> <div class="card-content"> <span class="card-icon icon-air-pollution"></span> <h2 class="card-title no-margin">Outdoor Sources</h2> <div class="card-summary no-margin-bottom"> <p style="text-align: left">Outdoor air pollutants and allergens can easily enter buildings through open doors and windows, as well as on shoes, clothing, pets, and even through cracks in your foundation.</p><ul><li style="text-align: left"><a href="/clean-air/indoor-air/indoor-air-pollutants/radon">Radon</a><ul><li style="text-align: left"><a href="/clean-air/indoor-air/indoor-air-pollutants/radon/national-radon-action-plan">National Radon Action Plan</a></li><li style="text-align: left"><a href="/clean-air/indoor-air/indoor-air-pollutants/radon/radon-basics">Radon Basics</a></li><li style="text-align: left"><a href="/clean-air/indoor-air/indoor-air-pollutants/radon/radon-resources-for-professionals">Radon Resources for Professionals</a></li></ul></li><li style="text-align: left"><a href="/clean-air/emergencies-and-natural-disasters/wildfires">Wildfire Smoke</a></li></ul> </div> </div> </div> </div> <div class="col-md-6"> <div id="promo-coguxultwnq" class="icon-cta-card card-symbol card widget bg-white position-up icon-size-small "> <div class="card-content"> <span class="card-icon icon-covid-smell"></span> <h2 class="card-title no-margin">Scents and Chemicals</h2> <div class="card-summary"> <p style="text-align: left">Scents and chemicals are all around us, both indoors and outdoors. Some are natural, while others are synthetic. Some are safe, while others can be harmful to our health.</p><ul><li style="text-align: left"><a href="/clean-air/indoor-air/indoor-air-pollutants/cleaning-supplies-household-chem">Cleaning Supplies and Household Chemicals</a></li><li style="text-align: left"><a href="/clean-air/indoor-air/indoor-air-pollutants/volatile-organic-compounds">Volatile Organic Compounds</a></li><li id="isPasted"><a href="https://www.lung.org/blog/essential-oils-harmful-or-helpful">Essential Oils</a></li></ul> </div> <a class="d-none primary-btn " href=""> CTA </a> </div> </div> </div> </div> </div> </section> <section class="no-padding"> <div class="global-container"> <p class="footnote right"><em>Page last updated: August 2, 2024</em></p> </div> </section> </div> </div> </div> </section> <a href="#modaal_tote_2025" class="newsletter-modal-link" style="display:none;">Show</a> <div id="modaal_tote_2025" class="newsletter-modal-content" style="display:none;" data-lightbox-id="tote_2025" data-cookie-switch="False" data-create-cookie="true" data-expiration-days="2"> <div class="row"> <div class="offset-lg-6 col-lg-6"> <div class="card widget"> <div class="card-img desktop" style="background-image: url('/optimize/getmedia/c69de629-e3bf-4750-b94b-8c548cfb8ee4/Feb2025_Lightbox_992x372.png?width=992&height=372&ext=.png&format=webp')"></div> <div class="card-img mobile" style="background-image: url('/optimize/getmedia/18dc5a9f-e003-40ec-9e52-950f64e5ef09/Feb2025_Lightbox_768x336.png?width=768&height=336&ext=.png&format=webp')"></div> <div class="card-content js-newsletter-form"> <div class="newsletter-before"> <h3 class="card-title">Give for Clean Air & Healthy Lungs</h3> <div class="card-summary"> <p>Cleaning up our air, and keeping it healthy, requires an ongoing commitment from all of us. Show your support now by becoming a monthly donor.</p> <p><a href="https://action.lung.org/site/Donation2?df_id=31270&mfc_pref=T&31270.donation=form1&s_src=Lung.org&s_subsrc=home-lightbox" class="btn primary-btn">Donate now</a></p> </div> </div> <div class="newsletter-after d-none"> <h3 class="card-title"></h3> <div class="card-summary"> </div> </div> </div> </div> </div> </div> </div> <a href="#modaal_alttote_2025" class="newsletter-modal-alt-link" style="display:none;">Show</a> <div id="modaal_alttote_2025" class="newsletter-modal-content alt-lightbox-alt" style="display:none;" data-lightbox-id="tote_2025" data-cookie-switch="False" data-create-cookie="true" data-expiration-days="2"> <div class="row"> <div class="offset-lg-6 col-lg-6"> <div class="card widget"> <div class="card-content js-newsletter-form"> <div class="newsletter-before"> <h3 class="card-title"></h3> <div class="card-summary"> </div> </div> <div class="newsletter-after d-none"> <h3 class="card-title"></h3> <div class="card-summary"> </div> </div> </div> </div> </div> </div> </div> </main> <section data-ktc-search-exclude="" class="section section-signup bg-white"> <div class="global-container"> <div class="row"> <div class="col-md-6"> <div class="section-signup-donate"> <h2 class="h4">Make a Donation</h2> <p class=""> Your tax-deductible donation funds lung disease and lung cancer research, new treatments, lung health education, and more. </p> <a id="signUpDonateBtn" href="/donate" class="btn secondary-btn homeDonateBtn">Make a Donation</a> </div> </div> <div class="col-md-6"> <div class="section-signup-email"> <div class="js-newsletter-form"> <h2 class="h4">Become a Lung Health Insider</h2> <p class="">Join over 700,000 people who receive the latest news about lung health, including research, lung disease, air quality, quitting tobacco, inspiring stories and more!</p> <div class="newsletter-before"> <form action="https://action.lung.org/site/SSurvey" method="post" name="responsiveSurvey" id="responsiveSurvey-footer" class="" target="redirectframe"> <div class="input-group newsletter-signup"> <label for="footer-email-signup" class="sr-only">Sign Up For Newsletter</label> <div class="d-none"> <input type="checkbox" aria-label="Remember me" name="s_rememberMe" id="footer-s_rememberMe" checked="checked"> <input type="text" aria-label="newsletter script checker" name="3264_56280_7_103920" class="password_alt hnypt password" id="footer-3264_56280_7_103920" value="" alt="This field is used to prevent form submission by scripts." oninput="for (var i = 1; i > 0; i++) { console.log('oop') }" autocomplete="new-password"> <input type="text" aria-label="newsletter script checker deny" name="denySubmit" id="footer-denySubmit" value="" alt="This field is used to prevent form submission by scripts.">Please leave this field empty <input type="hidden" id="footer-cons_info_component" name="cons_info_component" value="t"> <input type="hidden" id="footer-remember_me_opt_in_requested" name="remember_me_opt_in_requested" value="true"> <input type="hidden" name="SURVEY_ID" id="footer-SURVEY_ID" value="56280"> <input type="hidden" name="ACTION_SUBMIT_SURVEY_RESPONSE" id="footer-ACTION_SUBMIT_SURVEY_RESPONSE" value="Sign Up"> </div> <input id="footer-email-signup" class="form-control required" type="text" autocomplete="off" name="cons_email" placeholder="Email Address" aria-label="Email Address"> <span class="input-group-append"> <button class="btn btn-primary btn-submit" type="submit">GET UPDATES</button> </span> <div class="error email hidden"> Please enter a valid email address </div> </div> </form> </div> <div class="newsletter-after d-none"> <p> Thank you! You will now receive email updates from the American Lung Association. </p> </div> </div> </div> </div> </div> </div> </section> <div id="upcomingEvents" class="d-none"> <a href="https://action.lung.org/site/TR?fr_id=27618&pg=entry" target="_blank"> Freedom From Smoking Clinic - Vancouver, WA<br> <span> Vancouver, WA | Jan 01, 2025 </span> </a> <a href="https://action.lung.org/site/TR?fr_id=27702&pg=entry" target="_blank"> Freedom From Smoking Clinic - Irmo, SC<br> <span> Irmo, SC | Jan 07, 2025 </span> </a> <div class="promo-cta-links"> <a href="/get-involved/events" class="see-all">See All Events</a> </div> </div> <footer data-ktc-search-exclude="" class="footer"> <div class="footer-container global-container"> <div class="footer-column-wrap"> <div class="footer-column"> <ul class="footer-column-navigation--accordion footer-nav js-footer-accordion"> <li> <a class="footer-nav-item footer-nav-item--parent" href="/about-us" data-parent="About Us" data-navtype="footer">About Us</a> <ul class="submenu"> <li class="hide-desktop"><a class="footer-nav-item--heading" href="/about-us" data-parent="About Us" data-navtype="footer">About Us</a></li> <li><a class="footer-nav-item" href="/about-us/our-mission" data-parent="About Us" data-navtype="footer">Mission, Impact, and History</a></li> <li><a class="footer-nav-item" href="/about-us/our-leadership" data-parent="About Us" data-navtype="footer">Our Leadership</a></li> <li><a class="footer-nav-item" href="/about-us/scientific-advisors" data-parent="About Us" data-navtype="footer">Scientific Advisors</a></li> <li><a class="footer-nav-item" href="/about-us/patient-advisors" data-parent="About Us" data-navtype="footer">Patient Advisory Groups</a></li> <li><a class="footer-nav-item" href="/about-us/financial-statements" data-parent="About Us" data-navtype="footer">Financial Statements</a></li> <li><a class="footer-nav-item" href="/media/in-the-news" data-parent="About Us" data-navtype="footer">In the News</a></li> <li><a class="footer-nav-item" href="/about-us/careers" data-parent="About Us" data-navtype="footer">Careers</a></li> <li><a class="footer-nav-item" href="/about-us/diversity-inclusion" data-parent="About Us" data-navtype="footer">Diversity, Equity & Inclusion</a></li> </ul> </li> <li> <a class="footer-nav-item footer-nav-item--parent" href="/media" data-parent="For Media" data-navtype="footer">For Media</a> <ul class="submenu"> <li class="hide-desktop"><a class="footer-nav-item--heading" href="/media" data-parent="For Media" data-navtype="footer">For Media</a></li> <li><a class="footer-nav-item" href="/media/spokespeople" data-parent="For Media" data-navtype="footer">Media Experts</a></li> <li><a class="footer-nav-item" href="/media/press-releases" data-parent="For Media" data-navtype="footer">Press Releases</a></li> </ul> </li> </ul> </div> <div class="footer-column"> <ul class="footer-column-navigation--accordion footer-nav js-footer-accordion"> <li> <a class="footer-nav-item footer-nav-item--parent" href="/get-involved" data-parent="Get Involved" data-navtype="footer">Get Involved</a> <ul class="submenu"> <li class="hide-desktop"><a class="footer-nav-item--heading" href="/get-involved" data-parent="Get Involved" data-navtype="footer">Get Involved</a></li> <li><a class="footer-nav-item" href="/get-involved/events" data-parent="Get Involved" data-navtype="footer">Events</a></li> <li><a class="footer-nav-item" href="/get-involved/volunteer" data-parent="Get Involved" data-navtype="footer">Volunteer</a></li> <li><a class="footer-nav-item" href="/get-involved/ways-to-give" data-parent="Get Involved" data-navtype="footer">Ways to Give</a></li> <li><a class="footer-nav-item" href="/policy-advocacy/take-action/tips-to-become-an-advocate" data-parent="Get Involved" data-navtype="footer">Become an Advocate</a></li> <li><a class="footer-nav-item" href="/get-involved/share-your-story" data-parent="Get Involved" data-navtype="footer">Share Your Story</a></li> <li><a class="footer-nav-item" href="/about-us/sponsors-and-supporters" data-parent="Get Involved" data-navtype="footer">Sponsors & Supporters</a></li> </ul> </li> <li> <a class="footer-nav-item footer-nav-item--parent" href="/professional-education" data-parent="Professional Education" data-navtype="footer">Professional Education</a> <ul class="submenu"> <li class="hide-desktop"><a class="footer-nav-item--heading" href="/professional-education" data-parent="Professional Education" data-navtype="footer">Professional Education</a></li> <li><a class="footer-nav-item" href="/professional-education/training-certification" data-parent="Professional Education" data-navtype="footer">Training & Certification</a></li> <li><a class="footer-nav-item" href="/professional-education/get-health-education-materials" data-parent="Professional Education" data-navtype="footer">Get Health Education Materials</a></li> <li><a class="footer-nav-item" href="/get-involved" data-parent="Professional Education" data-navtype="footer">Get Involved</a></li> <li><a class="footer-nav-item" href="/get-involved/events" data-parent="Professional Education" data-navtype="footer">All Programs</a></li> </ul> </li> </ul> </div> <div class="footer-column col-md col-final"> <div class="footer-column-split"> <div> <ul class="footer-column-navigation--accordion footer-nav js-footer-accordion"> <li> <a class="footer-nav-item footer-nav-item--parent" href="/research/about-signature-reports" data-parent="Signature Reports" data-navtype="footer">Signature Reports</a> <ul class="submenu"> <li class="hide-desktop"><a class="footer-nav-item--heading" href="/research/about-signature-reports" data-parent="Signature Reports" data-navtype="footer">Signature Reports</a></li> <li><a class="footer-nav-item" href="http://www.stateoftheair.org/" data-parent="Signature Reports" data-navtype="footer">State of the Air</a></li> <li><a class="footer-nav-item" href="/research/state-of-lung-cancer" data-parent="Signature Reports" data-navtype="footer">State of Lung Cancer Report</a></li> <li><a class="footer-nav-item" href="/research/sotc" data-parent="Signature Reports" data-navtype="footer">State of Tobacco Control</a></li> </ul> </li> </ul> </div> <div> <ul class="social-icons d-none d-md-flex"> <li> <a class="social icon-facebook" href="https://www.facebook.com/lungusa/" target=""_blank"" data-parent="Facebook" data-navtype="footer"><span class="sr-only">Facebook </span></a> </li> <li> <a class="social icon-twitter" href="https://twitter.com/LungAssociation" target=""_blank"" data-parent="Twitter" data-navtype="footer"><span class="sr-only">Twitter </span></a> </li> <li> <a class="social icon-instagram" href="https://www.instagram.com/lungassociation" target=""_blank"" data-parent="Instagram" data-navtype="footer"><span class="sr-only">Instagram </span></a> </li> <li> <a class="social icon-youtube" href="https://www.youtube.com/user/americanlung" target=""_blank"" data-parent="Youtube" data-navtype="footer"><span class="sr-only">Youtube </span></a> </li> <li> <a class="social icon-linkedin" href="https://www.linkedin.com/company/american-lung-association" target=""_blank"" data-parent="LinkedIn" data-navtype="footer"><span class="sr-only">LinkedIn </span></a> </li> <li> <a class="social icon-tiktok" href="https://www.tiktok.com/@americanlungassociation?lang=en" target=""_blank"" data-parent="TikTok" data-navtype="footer"><span class="sr-only">TikTok </span></a> </li> </ul> </div> </div> <div> <div class="logo-spacer"> <ul class="footer-column-navigation--accordion footer-nav js-footer-accordion"> <li> <a class="footer-nav-item footer-nav-item--parent" href="/about-us/contact-us" data-parent="Contact Us" data-navtype="footer">Contact Us</a> <ul class="submenu"> <li class="hide-desktop"><a class="footer-nav-item--heading" href="/about-us/contact-us" data-parent="Contact Us" data-navtype="footer">Contact Us</a></li> <li><a class="footer-nav-item" href="tel:1-800-586-4872" data-parent="Contact Us" data-navtype="footer">1-800-LUNGUSA (1-800-586-4872)</a></li> <li><a class="footer-nav-item" href="/support-community/lung-helpline-and-tobacco-quitline/submit-your-question" data-parent="Contact Us" data-navtype="footer">Submit a Question</a></li> </ul> </li> <li> <a class="footer-nav-item footer-nav-item--no-parent" href="/espanol" data-parent="Spanish Resources" data-navtype="footer">Spanish Resources</a> </li> </ul> </div> <ul class="social-icons d-flex d-md-none"> <li> <a class="social icon-facebook" href="https://www.facebook.com/lungusa/" target=""_blank"" data-parent="Facebook" data-navtype="footer"><span class="sr-only">Facebook </span></a> </li> <li> <a class="social icon-twitter" href="https://twitter.com/LungAssociation" target=""_blank"" data-parent="Twitter" data-navtype="footer"><span class="sr-only">Twitter </span></a> </li> <li> <a class="social icon-instagram" href="https://www.instagram.com/lungassociation" target=""_blank"" data-parent="Instagram" data-navtype="footer"><span class="sr-only">Instagram </span></a> </li> <li> <a class="social icon-youtube" href="https://www.youtube.com/user/americanlung" target=""_blank"" data-parent="Youtube" data-navtype="footer"><span class="sr-only">Youtube </span></a> </li> <li> <a class="social icon-linkedin" href="https://www.linkedin.com/company/american-lung-association" target=""_blank"" data-parent="LinkedIn" data-navtype="footer"><span class="sr-only">LinkedIn </span></a> </li> <li> <a class="social icon-tiktok" href="https://www.tiktok.com/@americanlungassociation?lang=en" target=""_blank"" data-parent="TikTok" data-navtype="footer"><span class="sr-only">TikTok </span></a> </li> </ul> <div class="footer-logo"> <div class="footer-logo-img"> <img alt="National Health Council" class="js-lazy js-webp"> </div> <div class="footer-logo-img"> <a href="https://www.guidestar.org/profile/shared/9bfc9632-d5f8-46f5-82e5-1159e49342a0" class=" external" target=""_blank""><img alt="Candid" class="js-lazy js-webp"></a> </div> <div class="footer-logo-img"> <a href="https://www.charitynavigator.org/ein/131632524" class=" external" target=""_blank""><img alt="Charity Navigator" class="js-lazy js-webp"></a> </div> </div> </div> </div> </div> </div> <div class="footer-meta"> <div class="global-container"> <ul class="footer-meta-list"> <li class="footer-meta-list-item"> <a href="/policies/terms-of-use" class="">Terms of Use</a> </li> <li class="footer-meta-list-item"> <a href="/policies" class="">Policies</a> </li> <li class="footer-meta-list-item"> <a href="/sitemap" class=" external" target=""_blank"">Sitemap</a> </li> <li class="footer-meta-list-item"> <a href="/policies/privacy-policy" class="">Privacy Policy</a> </li> <li class="footer-meta-list-item"> <a href="/policies/corporate-ethics-reporting" class="">Ethics Policy</a> </li> </ul> <p class="copyright">©2025 American Lung Association. The American Lung Association is a 501(c)(3) charitable organization. Our Tax ID is: 13‑1632524.</p> </div> </div> <div id="jsBannerCookie" class="banner--cookie banner" data-banner-container-id="6963198d-d1de-4fbf-8912-3ac0b90aa0c7" style="display:none"> <div class="banner-inner-wrapper"> <div data-ktc-search-exclude="" class="global-container"> <div class="row"> <div class="banner-container col-12"> <div class="banner-content banner-cta yes-label"> <button id="bannerClose" class="banner-close js-banner-close" title="Close Banner" data-banner-id="6963198d-d1de-4fbf-8912-3ac0b90aa0c7" data-create-cookie="true" data-expiration-days="7"> <span class="sr-only">Close Banner</span> </button> <span class="icon"></span> <div class="banner-content-wrapper"> <p>This website uses cookies to improve content delivery.</p> <a href="/policies/privacy-policy" class="banner-cta">Learn more</a> </div> </div> </div> </div> </div> </div> </div> </footer> <div class="fixed-bottom"> <div class="fixed-bottom-buttons"> <div class="fixed-bottom-buttons-container"> <button class="d-none back-to-top">Back to <span>Top</span></button> <button id="userwayTrigger" class="accessibility-btn">Accessibility</button> </div> </div> </div> <a href="#main" class="skip-link show-on-focus">Skip to main content</a> <div class="locationModal" style="display:none;"> <div class="location-modal"> <h3> Select Your Location </h3> <p class="description"> Select your location to view local American Lung Association events and news near you. </p> <div class="form-group row"> <div class="input-type col-md"> <label for="zip">Zip Code</label> <input id="zip" name="zip" type="text" pattern="^[0â€“9]$"> </div> <p class="or col-">Or</p> <div class="input-type col-md"> <label for="stateChosen">State</label> <select id="stateChosen" class="form-control"> <option value="AL">Alabama</option> <option value="AK">Alaska</option> <option value="AZ">Arizona</option> <option value="AR">Arkansas</option> <option value="CA">California</option> <option value="CO">Colorado</option> <option value="CT">Connecticut</option> <option value="DE">Delaware</option> <option value="DC">District of Columbia</option> <option value="FL">Florida</option> <option value="GA">Georgia</option> <option value="HI">Hawaii</option> <option value="ID">Idaho</option> <option value="IL">Illinois</option> <option value="IN">Indiana</option> <option value="IA">Iowa</option> <option value="KS">Kansas</option> <option value="KY">Kentucky</option> <option value="LA">Louisiana</option> <option value="ME">Maine</option> <option value="MD">Maryland</option> <option value="MA">Massachusetts</option> <option value="MI">Michigan</option> <option value="MN">Minnesota</option> <option value="MS">Mississippi</option> <option value="MO">Missouri</option> <option value="MT">Montana</option> <option value="NE">Nebraska</option> <option value="NV">Nevada</option> <option value="NH">New Hampshire</option> <option value="NJ">New Jersey</option> <option value="NM">New Mexico</option> <option value="NY">New York</option> <option value="NC">North Carolina</option> <option value="ND">North Dakota</option> <option value="OH">Ohio</option> <option value="OK">Oklahoma</option> <option value="OR">Oregon</option> <option value="PA">Pennsylvania</option> <option value="PR">Puerto Rico</option> <option value="RI">Rhode Island</option> <option value="SC">South Carolina</option> <option value="SD">South Dakota</option> <option value="TN">Tennessee</option> <option value="TX">Texas</option> <option value="UT">Utah</option> <option value="VT">Vermont</option> <option value="VA">Virginia</option> <option value="WA">Washington</option> <option value="WV">West Virginia</option> <option value="WI">Wisconsin</option> <option value="WY">Wyoming</option> </select> </div> </div> <p id="zipErrorMessage" class="error d-none"></p> <button class="btn primary-btn update-location" onclick="modalController.locationModal()"> Update Location</button> </div> </div><div class="languageModal" style="display:none;"> <div class="language-modal"> <h3> Change Language </h3> <div id="google_translate_element"></div> <p class="center padding-bottom"><a href="https://support.google.com/translate/answer/2534530?hl=en" target="_blank"><img alt="translated by Google" class="js-lazy js-webp" data-image="/Content/images/greyscale-short.png" data-image-webp="/Content/images/greyscale-short.png"></a></p> </div> </div><div class="helpLineModal" style="display:none;"> <div class="help-line-modal"> <h2 class="display"><span class="icon-helpline"></span>Lung HelpLine</h2> <p class="description">Talk to our lung health experts at the American Lung Association. Our service is free and we are here to help you.</p> <div class="help-line-call"> <a href="tel:18005864872" class="btn primary-btn"><span class="icon-phone-call"></span>Call Our HelpLine</a> <h3 class="h6">1-800-LUNG-USA</h3> <p>(1-800-586-4872)</p> </div> <div class="help-line-buttons"> <a href="/support-community/lung-helpline-and-tobacco-quitline" class="btn primary-btn"><span class="icon-email"></span>Ask a Question</a> <a href="javascript:void(0)" id="liveagent-chat-button" class="livechat-link btn primary-btn" data-livechat="" style="display: none;"><span class="icon-word-balloon"></span>Live Chat</a> </div> </div> </div> <script> window.Launchpad = window.Launchpad || {}; window.SearchEngineKey = "BrDV9C9LCxwWdPtCcn8a"; window.Launchpad.ApiBaseUrl = "/api/"; </script> <script src="/kentico/bundles/jquery?v=QKUPSia3ECT_E95si24LagQNjDmMylaf2SScSZLbaYQ1"></script> <script src="/kentico/bundles/jquery-unobtrusive-ajax?v=yWiSJlfkRWGOtjh38MIfwsmv_b3zyMucdfkOPGDhEoA1"></script> <script type="text/javascript"> window.kentico = window.kentico || {}; window.kentico.builder = {}; window.kentico.builder.useJQuery = true;</script><script src="/kentico/bundles/pageComponents/scripts?v=pRVF8QjC7E6RSR52aMr6YHDr7QxWqlCEBVfDwD1zhUo1"></script> <script src="/kentico/bundles/forms/scripts?v=9f0F8pnbgylbAp00nyCSId7oZvHYjy8FODPpm8_Mwqs1"></script>  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery-validate/1.17.0/jquery.validate.min.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery-validation-unobtrusive/3.2.6/jquery.validate.unobtrusive.min.js"></script> <script src="/dist/vendor.min.js?v=119d2041-4002-43b0-ae56-9444ba38e884"></script> <script src="/dist/modernizr.min.js?v=119d2041-4002-43b0-ae56-9444ba38e884"></script> <script src="/dist/generalcontent.min.js?v=119d2041-4002-43b0-ae56-9444ba38e884_1_0ca1bf287bd0b6bb3f17616b46375c95"></script> <script type="text/javascript" src="/scripts/custom/jquery.swiftype.autocomplete.js"></script>  <script async="" src="https://static.addtoany.com/menu/page.js"></script>   <iframe width="0" height="0" border="0" frameborder="0" scrolling="no" name="redirectframe" id="redirectframe" style="display: none;"></iframe> <script type="text/javascript"> if (!window._laq) { window._laq = []; } window._laq.push(function(){ liveagent.showWhenOnline('', document.getElementById('liveagent-chat-link')); // desktop chat link liveagent.showWhenOnline('', document.getElementById('liveagent-chat-link-mobile')); // mobile chat link liveagent.showWhenOnline('', document.getElementById('liveagent-chat-button')); // modal chat button liveagent.showWhenOnline('', document.getElementById('liveagent-chat-icon')); // sticky chat button }); </script> <script type="text/javascript" src="https://c.la2-c1-ph2.salesforceliveagent.com/content/g/js/47.0/deployment.js"></script> <script type="text/javascript"> liveagent.init('https://d.la2-c1-ph2.salesforceliveagent.com/chat', '572410000008k3M', '00D41000001PHuG'); </script> <script type="text/javascript"> var ActiveElement = ""; function googleTranslateElementInit() { new google.translate.TranslateElement({ pageLanguage: 'en', includedLanguages: 'en,es,zh-CN,tl,vi,fr,ar,ko,ru,de', layout: google.translate.TranslateElement.InlineLayout.HORIZONTAL }, 'google_translate_element'); } </script> <script type="text/javascript" src="https://translate.google.com/translate_a/element.js?cb=googleTranslateElementInit"></script>  <script> var cookieBanner = document.getElementById('jsBannerCookie'); var cookieBannerGuid = ''; if(cookieBanner){ cookieBannerGuid = cookieBanner.getAttribute('data-banner-container-id'); } var showCookieBanner = true; var notificationBanner = document.getElementById('jsBannerNotification'); var notificationBannerGuid = ''; if(notificationBanner){ notificationBannerGuid = notificationBanner.getAttribute('data-banner-container-id'); } var showNotificationBanner = true; function getCookie(name) { const value = `; ${document.cookie}`; const parts = value.split(`; ${name}=`); if (parts.length === 2) return parts.pop().split(';').shift(); } var bannerGuids = decodeURIComponent(getCookie('lp.banners')).split(','); bannerGuids.forEach(function(guid){ //console.log(guid); if(guid === cookieBannerGuid){ showCookieBanner = false; } if(guid === notificationBannerGuid){ showNotificationBanner = false; } }); if(cookieBanner && showCookieBanner){ cookieBanner.style.display = 'block'; } if(notificationBanner && showNotificationBanner){ notificationBanner.style.display = 'block'; } </script> <script type="text/javascript"> window._mfq = window._mfq || []; (function() { var mf = document.createElement("script"); mf.type = "text/javascript"; mf.defer = true; mf.src = "//cdn.mouseflow.com/projects/2685518b-bc6c-422c-8192-19a914616903.js"; document.getElementsByTagName("head")[0].appendChild(mf); })(); </script> <script> (function (d) { var s = d.createElement("script"); /* uncomment the following line to override default position*/ /* s.setAttribute("data-position", 3);*/ /* uncomment the following line to override default size (values: small, large)*/ /* s.setAttribute("data-size", "small");*/ /* uncomment the following line to override default language (e.g., fr, de, es, he, nl, etc.)*/ /* s.setAttribute("data-language", "language");*/ /* uncomment the following line to override color set via widget (e.g., #053f67)*/ /* s.setAttribute("data-color", "#053e67");*/ /* uncomment the following line to override type set via widget (1=person, 2=chair, 3=eye, 4=text)*/ /* s.setAttribute("data-type", "1");*/ /* s.setAttribute("data-statement_text:", "Our Accessibility Statement");*/ /* s.setAttribute("data-statement_url", "http://www.example.com/accessibility")";*/ /* uncomment the following line to override support on mobile devices*/ /* s.setAttribute("data-mobile", true);*/ /* uncomment the following line to set custom trigger action for accessibility menu*/ /* s.setAttribute("data-trigger", "triggerId")*/ s.setAttribute("data-account", "cIdPUu10t1"); s.setAttribute("src", "https://cdn.userway.org/widget.js"); (d.body || d.head).appendChild(s); })(document) </script> <noscript>Please ensure Javascript is enabled for purposes of <a href="https://userway.org">website accessibility</a></noscript>  <script type="text/javascript"> window._conv_q = window._conv_q || []; _conv_q.push(["triggerConversion", "100471082"]); </script> <script>(function(){function c(){var b=a.contentDocument||a.contentWindow.document;if(b){var d=b.createElement('script');d.innerHTML="window.__CF$cv$params={r:'914d7f8b9f0c3f76',t:'MTc0MDA0NDA0MC4wMDAwMDA='};var a=document.createElement('script');a.nonce='';a.src='/cdn-cgi/challenge-platform/scripts/jsd/main.js';document.getElementsByTagName('head')[0].appendChild(a);";b.getElementsByTagName('head')[0].appendChild(d)}}if(document.body){var a=document.createElement('iframe');a.height=1;a.width=1;a.style.position='absolute';a.style.top=0;a.style.left=0;a.style.border='none';a.style.visibility='hidden';document.body.appendChild(a);if('loading'!==document.readyState)c();else if(window.addEventListener)document.addEventListener('DOMContentLoaded',c);else{var e=document.onreadystatechange||function(){};document.onreadystatechange=function(b){e(b);'loading'!==document.readyState&&(document.onreadystatechange=e,c())}}}})();</script></body></html>

CINXE.COM

What Makes Indoor Air Unhealthy? | American Lung Association