What Makes Outdoor Air Unhealthy | American Lung Association

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Learn about outdoor air pollutants and the sources of pollution and how they can be cleaned up so everyone can breathe safer, healthier air.</p> </div> </div> </div> </div> </section> <section class=" " style="" id="section_0aac201683c0"> <div class="global-container"> <div class="row "> <div class="col-12"> <div class="fr-view"> <h2 id="isPasted">Common Outdoor Air Pollutants</h2> </div> <div class="card accordion widget" id="panel_708659a34431"> <button class="card-title accordion-title " aria-expanded="false"> Ozone </button> <section class="card-content accordion-content" aria-labelledby="Ozone"> <p><a href="/clean-air/outdoors/what-makes-air-unhealthy/ozone">Ozone </a>(also called smog) is currently one of the least-well-controlled pollutants in the United States. It is also one of the most dangerous—and it's invisible.</p> </section> </div> <div class="card accordion widget" id="panel_28925373f0a6"> <button class="card-title accordion-title " aria-expanded="false"> Particulate Matter </button> <section class="card-content accordion-content" aria-labelledby="Particulate Matter"> <p><a href="/clean-air/outdoors/what-makes-air-unhealthy/particle-pollution">Particulate matter</a> (also called particle pollution or soot) refers to a mix of very tiny solid and liquid particles that are in the air we breathe. It is dangerous enough to shorten your life.</p> </section> </div> <div class="card accordion widget" id="panel_bcb3db28831a"> <button class="card-title accordion-title " aria-expanded="false"> Nitrogen Dioxide </button> <section class="card-content accordion-content" aria-labelledby="Nitrogen Dioxide"> <p><a href="/clean-air/outdoors/what-makes-air-unhealthy/nitrogen-dioxide">Nitrogen dioxide</a> is a gas that comes from burning fuels. Live near a busy highway or a power plant that burns gas? You may be breathing a lot of nitrogen dioxide.</p> </section> </div> <div class="card accordion widget" id="panel_b65310b1a13e"> <button class="card-title accordion-title " aria-expanded="false"> Sulfur Dioxide </button> <section class="card-content accordion-content" aria-labelledby="Sulfur Dioxide"> <p><a href="/clean-air/outdoors/what-makes-air-unhealthy/sulfur-dioxide">Sulfur dioxide</a> forms when sulfur-containing fuel such as coal, oil or diesel is burned. Live near a power plant or a port? You may have more sulfur dioxide in your air.</p> </section> </div> <div class="card accordion widget" id="panel_41c5979fa65d"> <button class="card-title accordion-title " aria-expanded="false"> Toxic Air Pollutants </button> <section class="card-content accordion-content" aria-labelledby="Toxic Air Pollutants"> <p>Nearly 200 <a href="/clean-air/outdoors/what-makes-air-unhealthy/toxic-air-pollutants">other pollutants</a> emitted into the air can cause diseases, including lung cancer, or cause other harmful effects.</p> </section> </div> </div> </div> </div> </section> <section class=" " style="" id="section_53026629b81c"> <div class="global-container"> <div class="row "> <div class="col-12"> <div class="fr-view"> <h2 id="isPasted">Sources of Outdoor Air Pollution</h2> </div> <div class="card accordion widget" id="panel_3584cbe83b2b"> <button class="card-title accordion-title " aria-expanded="false"> Electric Utilities </button> <section class="card-content accordion-content" aria-labelledby="Electric Utilities"> <p><a href="/clean-air/outdoors/what-makes-air-unhealthy/electric-utilities">Power plants</a> that burn coal, gas, oil and biomass produce harmful air pollutants. Generating electricity from zero-emission sources instead, like solar and wind, is critical for lung health.</p> </section> </div> <div class="card accordion widget" id="panel_461096605807"> <button class="card-title accordion-title " aria-expanded="false"> Transportation </button> <section class="card-content accordion-content" aria-labelledby="Transportation"> <p><a href="/clean-air/outdoors/what-makes-air-unhealthy/transportation">All vehicles that burn fuel</a>, like gas and diesel, pollute the air and harm human health - cars, trucks, planes, ships, trains, and more. Pipelines that transport fuels add to air pollution, too. Switching to zero-emission transportation is essential for healthy lungs.</p> </section> </div> <div class="card accordion widget" id="panel_50521593fcd2"> <button class="card-title accordion-title " aria-expanded="false"> Residential Sources </button> <section class="card-content accordion-content" aria-labelledby="Residential Sources"> <p>Heating, cooling and <a href="/clean-air/outdoors/what-makes-air-unhealthy/residential">powering our homes</a> all produce emissions that can harm health, including in our own neighborhoods.</p><p><a href="/getmedia/a316752e-7888-4421-8bb9-188a1c7e1ef3/ALA-Pipe-Line-Infographic.pdf" target="_blank" rel="noopener noreferrer"><i id="isPasted">This infographic</i></a><i id="isPasted"> has more information on how methane gas (also called "natural gas") specifically harms health at every stage of its journey.</i></p> </section> </div> <div class="card accordion widget" id="panel_9771a4f7a74b"> <button class="card-title accordion-title " aria-expanded="false"> Commercial and Industrial </button> <section class="card-content accordion-content" aria-labelledby="Commercial and Industrial"> <p>Harmful emissions come from heating, cooling and <a href="/clean-air/outdoors/what-makes-air-unhealthy/commercial-and-industrial">powering businesses and industrial operations</a>, as well as from manufacturing processes.</p> </section> </div> <div class="card accordion widget" id="panel_802343345dfb"> <button class="card-title accordion-title " aria-expanded="false"> Emergencies and Natural Disasters </button> <section class="card-content accordion-content" aria-labelledby="Emergencies and Natural Disasters"> <p><a href="/clean-air/emergencies-and-natural-disasters">Wildfires, flooding, hurricanes and other natural events</a> can create unhealthy air, especially for people with lung disease. And the cleanup often adds to the challenge.</p> </section> </div> <div class="card accordion widget" id="panel_bb2c81607549"> <button class="card-title accordion-title " aria-expanded="false"> Climate Change </button> <section class="card-content accordion-content" aria-labelledby="Climate Change"> <p><a href="/clean-air/climate-change">Climate change</a> poses a grave health threat to everyone, with serious risks to lung health.</p> </section> </div> </div> </div> </div> </section> <section class=" " style="" id="section_fc062fed2a43"> <div class="global-container"> <div class="row "> <div class="col-12"> <section id="promo-jc0owsjgdui" class="show-icon position-left bg-accent banner-widget promo promo-widget tablet-promo promo-section promo-cta-btns promo-section--center no-img widget "> <div class="promo-card"> <div class="promo-card-content"> <div class="promo-card-content-wrap"> <span class="card-icon icon-advocacytwo"></span> <div class="promo-card-content-txt"> <p>Learn more about advocacy efforts to clean up pollution nationwide and raise your voice for healthy air.</p> <div class="promo-card-ctas"> <a href="/policy-advocacy/healthy-air-campaign">Take Action</a> </div> </div> </div> </div> </div> </section> </div> </div> </div> </section> <section class="no-padding"> <div class="global-container"> <p class="footnote right"><em>Page last updated: October 29, 2024</em></p> </div> </section> </div> </div> </div> </section> <a href="#modaal_nov_match_2024_copd" class="newsletter-modal-link" style="display:none;">Show</a> <div id="modaal_nov_match_2024_copd" class="newsletter-modal-content" style="display:none;" data-lightbox-id="nov_match_2024_copd" data-cookie-switch="False" data-create-cookie="true" data-expiration-days="5"> <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/ff1883ab-b03d-4f21-8d49-b47874d9f451/john_lightbox_L.jpg?width=992&height=372&ext=.jpg&format=webp')"></div> <div class="card-img mobile" style="background-image: url('/optimize/getmedia/c228d8f4-b0d3-4f3d-95ce-0ff36b7521df/john_lightbox_DM.jpg?width=768&height=336&ext=.jpg&format=webp')"></div> <div class="card-content js-newsletter-form"> <div class="newsletter-before"> <h3 class="card-title">Double Your Support Now</h3> <div class="card-summary"> <p>Your gift will have 2X the impact this COPD Awareness Month.</p> <p><a href="https://action.lung.org/site/Donation2?df_id=31271&mfc_pref=T&31271.donation=form1&topic=2024NovMatch2X&s_src=Lung.org&s_subsrc=home-lightbox" class="btn primary-btn">Donate today</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_altnov_match_2024_copd" class="newsletter-modal-alt-link" style="display:none;">Show</a> <div id="modaal_altnov_match_2024_copd" class="newsletter-modal-content alt-lightbox-alt" style="display:none;" data-lightbox-id="nov_match_2024_copd" data-cookie-switch="False" data-create-cookie="true" data-expiration-days="5"> <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="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; 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What Makes Outdoor Air Unhealthy | American Lung Association