Carbon calculator: let us equip you with the right tool to help you fight climate change | Environment

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We created the tool in response to the fact that, although there are loads of calculators out there, none of them really do what we feel they should.</p><p>One problem is that existing carbon calculators tend to focus exclusively our consumption of gas, electricity, car fuel and flights. Significant as these emissions sources are, they only add up to around half of the average footprint. The other half is made up of all the other goods and services we purchase – everything from food to gadgets to healthcare. These "indirect" emissions often get missed out, so our tool includes them and aims to provide a more rounded picture of the emissions we're each responsible for.</p><p>Instead of entering precise numbers for only a part of your carbon footprint (gas and electricity bills), you enter more approximate information for all of it. To keep things simple, we've also designed the calculator just for individuals - it doesn't look at households or include emissions from your workplace. We hope this makes it quicker to use, as well as giving ameaningful result. To create the tool, we started off with a summary of the UK's total carbon footprint, including those <a href="http://web.archive.org/web/20091024040900/http://www.guardian.co.uk/environment/2009/feb/23/china-co2-emissions-climate" title="emissions embedded in the goods we import from China">emissions embedded in the goods we import from China</a> and other countries. The summary breaks down the total into 15 key areas – everything from domestic electricity use through to the manufacture of paper products and cars.</p><p>Next, we divided these 15 numbers by the UK's population to provide a comprehensive breakdown of the carbon footprint of a typical UK resident. Then we created a set of sliders that enable you to change each figure to reflect your own lifestyle.</p><p>If you're interested in the detailed methodology behind the calculator, here a few points about the data:</p><p>• The figures for UK emissions are based on a sophisticated "<a href="http://web.archive.org/web/20091024040900/http://en.wikipedia.org/wiki/Input-output_model" title="input-output model">input-output model</a>" created by <a href="http://web.archive.org/web/20091024040900/http://www.sw-consulting.co.uk/" title="Small World Consulting">Small World Consulting</a>. They include all the Kyoto greenhouse gases (such as methane and nitrous oxide as well as CO2) and are adjusted for imports and exports. In other words, the figures are as close as we can get to an accurate summary of the carbon footprint of all the imported goods and services that UK citizens consume.</p><p>• Since the Small World input-output model exists only for the UK, the figures for different countries shown to the right of the tool are approximate. We've arrived at them using data for national emissions and imports and exports, so they should be considered as indicative rather than precise.</p><p>• We've tentatively included for comparison a figure for a "sustainable" footprint. We've plumped for 3.1 tonnes by 2050, based on the <a href="http://web.archive.org/web/20091024040900/http://www.guardian.co.uk/politics/2008/oct/16/greenpolitics-edmiliband" title="UK's target for an 80% cut in emissions by 2050">UK's target for an 80% cut in emissions by 2050</a> but factoring in carbon from goods in addition. But we're well aware that what counts as a sustainable footprint depends on a whole host of assumptions, including how quickly we reduce our emissions and how much risk of runaway climate change we're prepared to accept. Again, then, this is just an indicative number. Some people would argue that the only truly sustainable footprint is a non-existent one.</p><p>• For more information on what's included in each slider, click on the question marks next to <a href="http://web.archive.org/web/20091024040900/http://www.guardian.co.uk/environment/interactive/2009/oct/20/guardian-quick-carbon-calculator" title="each slider on the calculator">each one on the calculator</a>.</p><p>Lastly, it's worth saying the calculator is very much a continual work in progress, so if you have suggestions for features or improvements, let us know in the comments below. Equally, we're keen to answer any questions you have about the data too.</p><p>• <a href="http://web.archive.org/web/20091024040900/http://www.guardian.co.uk/environment/green-living-blog/2009/oct/21/quick-carbon-calculator-tips" title="carbon footprint">Click here for tips on cutting your carbon footprint</a>.</p> </div> </div> <div id="related"> <div class="blog-byline"> <a href="http://web.archive.org/web/20091024040900/http://www.guardian.co.uk/profile/duncanclark" title="Contributor's page"> <img src="http://web.archive.org/web/20091024040900im_/http://static.guim.co.uk/sys-images/Guardian/Pix/pictures/2008/12/1/1228150836411/Duncan_Clark_Profile_Pic.jpg" width="60" height="60" alt="Duncan Clark"/> </a> <span>Posted by</span> <a href="http://web.archive.org/web/20091024040900/http://www.guardian.co.uk/profile/duncanclark" name="&lid={blogBylineContributor}{Duncan Clark}&lpos={blogBylineContributor}{1}">Duncan Clark</a> Wednesday 21 October 2009 <span class="timestamp">08.30 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alt="${comment.Author.displayName}'s profile picture" title="${comment.Author.displayName}" name="&lid={viewComments}{${comment.Author.displayName}}&lpos={viewComments}{${comment_index}}"/> </a> <a href="${userProfileUrlPrefix}/${comment.Author.displayName|toLowerCase}" name="&lid={viewComments}{${comment.Author.displayName}}&lpos={viewComments}{${comment_index}}"> ${comment.Author.displayName} </a></h3> <p class="posted-time">${comment.PostedAtTime|formatDateTime:MessageTime}</p> </div> <span class="author-tier"> <a class="rollover" title="${comment.Author.userTier}"> {if comment.Author.isStaff} {var srcAttr = 'src="' + staticRoot + 'images/communities/icons_staff_28.gif"'} <img ${srcattr} width="28" height="28" title="${comment.Author.userTier}" alt="${comment.Author.userTier}"/> <span>Staff</span> {elseif comment.Author.isContributor} {var srcAttr = 'src="' + staticRoot + 'images/communities/icons_contributor_28.gif"'} <img ${srcattr} width="28" height="28" title="${comment.Author.userTier}" alt="${comment.Author.userTier}"/> <span>Contributor</span> {else} {/if} </a> </span> {if comment.IsFeatured && currentUser && currentUser.hasCapability('featureComment')} <div style="clear:both; color: orange;"> Featured comment </div> {/if} {if comment.ContentBlockingState != "Unblocked"} <div class="pluck-comment-body comment-blocked"> ${|getCommentBlockedMessage} </div> </li> {else} <div class="pluck-comment-body"> ${comment.CommentBody} </div> </li> <li class="pluck-comment-tools"> <ul id="${comment.CommentKey.Key}"> {if currentUser && currentUser.hasCapability('featureComment')} <li> {if comment.IsFeatured} <a href="javascript:void(0)" title="Feature this comment." class="unfeature">Unfeature</a> {else} <a href="javascript:void(0)" title="Feature this comment." class="feature">Feature</a> {/if} </li> {/if} <li class="recomended"> {if comment.CurrentUserHasRecommended == "False" && !commentRecommendingClosed} <a href="javascript:void(0)" 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class="pluck-comment-author"> <h3><a href="${userProfileUrlPrefix}/${comment.Author.displayName|toLowerCase}" class="author-profile-picture"> {var srcAttr = 'src="' + comment.Author.photoUrl + '"'} <img ${srcattr} width="60" height="60" alt="${comment.Author.displayName}'s profile picture" title="${comment.Author.displayName}" name="&lid={viewComments}{${comment.Author.displayName}}&lpos={viewComments}{0}"/> </a> Chalkboard created by: <a href="${userProfileUrlPrefix}/${comment.Author.displayName|toLowerCase}" name="&lid={viewComments}{${comment.Author.displayName}}&lpos={viewComments}{0}"> ${comment.Author.displayName} </a></h3> <p class="posted-time">${comment.PostedAtTime|formatDateTime:MessageTime}</p> </div> <span class="author-tier"> <a class="rollover" title="${comment.Author.userTier}"> {if comment.Author.isStaff} {var srcAttr = 'src="' + staticRoot + 'images/communities/icons_staff_28.gif"'} <img ${srcattr} width="28" height="28" title="${comment.Author.userTier}" 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<li> <div class="trail-caption"> <div class="linktext"> <a href="http://web.archive.org/web/20091024040900/http://www.treehugger.com/" name="&lid={trailItemImageAndTrailText}{TreeHugger}&lpos={trail}{1}" class="link-text">TreeHugger</a> </div> </div> </li> </ul> </div> </div> </div> <div id="blogs-calendar"> <div class="capsule"> <h2>Green living blog weekly archives</h2> <div id="calendar-container"> <table title="Calendar for October" summary="Calendar for October" id="calendar"> <thead> <tr> <th colspan="7" scope="col"> <strong class="month">Oct 2009</strong> <a title="Previous month" href="http://web.archive.org/web/20091024040900/http://www.guardian.co.uk/environment/green-living-blog/2009/sep/28/week" name="&lid={calendarNavigation}{Previous}&lpos={calendarNavigation}{1}" class="previous"> <img src="http://web.archive.org/web/20091024040900im_/http://static.guim.co.uk/static/80746/common/images/calendar/left_arrow.gif" alt="Previous" height="18" width="19"/> </a> </th> </tr> <tr class="month-nav"> <th scope="col" title="Monday" class="first">M</th> <th scope="col" title="Tuesday">T</th> <th scope="col" title="Wednesday">W</th> <th scope="col" title="Thursday">T</th> <th scope="col" title="Friday">F</th> <th scope="col" title="Saturday">S</th> <th scope="col" title="Sunday" class="last">S</th> </tr> </thead> <tbody> <tr class=" has-links "> <td class="not-this-month first">28</td> <td class="not-this-month ">29</td> <td class="not-this-month ">30</td> <td><a href="http://web.archive.org/web/20091024040900/http://www.guardian.co.uk/environment/green-living-blog/2009/sep/28/week" name="&lid={calendarNavigation}{Calendar 1}&lpos={calendarNavigation}{2}">1</a></td> <td><a href="http://web.archive.org/web/20091024040900/http://www.guardian.co.uk/environment/green-living-blog/2009/sep/28/week" name="&lid={calendarNavigation}{Calendar 2}&lpos={calendarNavigation}{3}">2</a></td> <td><a href="http://web.archive.org/web/20091024040900/http://www.guardian.co.uk/environment/green-living-blog/2009/sep/28/week" name="&lid={calendarNavigation}{Calendar 3}&lpos={calendarNavigation}{4}">3</a></td> <td class="last"><a href="http://web.archive.org/web/20091024040900/http://www.guardian.co.uk/environment/green-living-blog/2009/sep/28/week" name="&lid={calendarNavigation}{Calendar 4}&lpos={calendarNavigation}{5}">4</a></td> </tr> <tr class=" has-links "> <td class="first"><a href="http://web.archive.org/web/20091024040900/http://www.guardian.co.uk/environment/green-living-blog/2009/oct/05/week" name="&lid={calendarNavigation}{Calendar 5}&lpos={calendarNavigation}{6}">5</a></td> <td><a href="http://web.archive.org/web/20091024040900/http://www.guardian.co.uk/environment/green-living-blog/2009/oct/05/week" name="&lid={calendarNavigation}{Calendar 6}&lpos={calendarNavigation}{7}">6</a></td> <td><a href="http://web.archive.org/web/20091024040900/http://www.guardian.co.uk/environment/green-living-blog/2009/oct/05/week" name="&lid={calendarNavigation}{Calendar 7}&lpos={calendarNavigation}{8}">7</a></td> <td><a href="http://web.archive.org/web/20091024040900/http://www.guardian.co.uk/environment/green-living-blog/2009/oct/05/week" name="&lid={calendarNavigation}{Calendar 8}&lpos={calendarNavigation}{9}">8</a></td> <td><a href="http://web.archive.org/web/20091024040900/http://www.guardian.co.uk/environment/green-living-blog/2009/oct/05/week" name="&lid={calendarNavigation}{Calendar 9}&lpos={calendarNavigation}{10}">9</a></td> <td><a href="http://web.archive.org/web/20091024040900/http://www.guardian.co.uk/environment/green-living-blog/2009/oct/05/week" name="&lid={calendarNavigation}{Calendar 10}&lpos={calendarNavigation}{11}">10</a></td> <td class="last"><a href="http://web.archive.org/web/20091024040900/http://www.guardian.co.uk/environment/green-living-blog/2009/oct/05/week" name="&lid={calendarNavigation}{Calendar 11}&lpos={calendarNavigation}{12}">11</a></td> </tr> <tr class=" has-links "> <td class="first"><a href="http://web.archive.org/web/20091024040900/http://www.guardian.co.uk/environment/green-living-blog/2009/oct/12/week" name="&lid={calendarNavigation}{Calendar 12}&lpos={calendarNavigation}{13}">12</a></td> <td><a href="http://web.archive.org/web/20091024040900/http://www.guardian.co.uk/environment/green-living-blog/2009/oct/12/week" name="&lid={calendarNavigation}{Calendar 13}&lpos={calendarNavigation}{14}">13</a></td> <td><a href="http://web.archive.org/web/20091024040900/http://www.guardian.co.uk/environment/green-living-blog/2009/oct/12/week" name="&lid={calendarNavigation}{Calendar 14}&lpos={calendarNavigation}{15}">14</a></td> <td><a href="http://web.archive.org/web/20091024040900/http://www.guardian.co.uk/environment/green-living-blog/2009/oct/12/week" name="&lid={calendarNavigation}{Calendar 15}&lpos={calendarNavigation}{16}">15</a></td> <td><a href="http://web.archive.org/web/20091024040900/http://www.guardian.co.uk/environment/green-living-blog/2009/oct/12/week" name="&lid={calendarNavigation}{Calendar 16}&lpos={calendarNavigation}{17}">16</a></td> <td><a href="http://web.archive.org/web/20091024040900/http://www.guardian.co.uk/environment/green-living-blog/2009/oct/12/week" name="&lid={calendarNavigation}{Calendar 17}&lpos={calendarNavigation}{18}">17</a></td> <td class="last"><a href="http://web.archive.org/web/20091024040900/http://www.guardian.co.uk/environment/green-living-blog/2009/oct/12/week" name="&lid={calendarNavigation}{Calendar 18}&lpos={calendarNavigation}{19}">18</a></td> </tr> <tr class=" has-links "> <td class="first"><a href="http://web.archive.org/web/20091024040900/http://www.guardian.co.uk/environment/green-living-blog/2009/oct/19/week" name="&lid={calendarNavigation}{Calendar 19}&lpos={calendarNavigation}{20}">19</a></td> <td><a href="http://web.archive.org/web/20091024040900/http://www.guardian.co.uk/environment/green-living-blog/2009/oct/19/week" name="&lid={calendarNavigation}{Calendar 20}&lpos={calendarNavigation}{21}">20</a></td> <td><a href="http://web.archive.org/web/20091024040900/http://www.guardian.co.uk/environment/green-living-blog/2009/oct/19/week" name="&lid={calendarNavigation}{Calendar 21}&lpos={calendarNavigation}{22}" class="today">21</a></td> <td><a href="http://web.archive.org/web/20091024040900/http://www.guardian.co.uk/environment/green-living-blog/2009/oct/19/week" name="&lid={calendarNavigation}{Calendar 22}&lpos={calendarNavigation}{23}">22</a></td> <td><a href="http://web.archive.org/web/20091024040900/http://www.guardian.co.uk/environment/green-living-blog/2009/oct/19/week" name="&lid={calendarNavigation}{Calendar 23}&lpos={calendarNavigation}{24}">23</a></td> <td>24</td> <td class="last">25</td> </tr> <tr class=" "> <td class="first">26</td> <td>27</td> <td>28</td> <td>29</td> 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class="active">UK</a> </li> <li id="global-jobs-2-link"> <a href="#global-jobs-2" class="inactive">USA</a> </li> </ul> <div class="pane-wrapper"> <div id="global-jobs-1" class="global-jobs-pane tab-toggle-pane"> <h3 class="js-hider">UK</h3> <div class="capsule jobsbox"> <form action="http://web.archive.org/web/20091024040900/http://jobs.guardian.co.uk/searchjobs/" onsubmit="return doSearchAllSubmitUK( this );"> <fieldset> <input type="text" class="text plain-search" id="freetext-searchalljobs" name="freetext" value="Search all environment jobs" onfocus="this.value='';"/> <input type="hidden" name="csr" value="environment"/> <input type="hidden" name="keyword" id="keyword-searchalljobs" value=""/> <input type="submit" class="submit" name="go" value="Go"/> <input type="hidden" name="gusrc" value="gu_jobs_box_Environment"/> <input type="hidden" name="link" value="Environment_jbx_go"/> <input type="hidden" name="industry" value="141"/> </fieldset> </form> <p class="find-a-job"> <a href="http://web.archive.org/web/20091024040900/http://jobs.guardian.co.uk/jobs/environment?gusrc=gu_jobs_box_Environment&link=Environment_jbx_brsesec" name="&lid={jobsBox}{Browse environment jobs}&lpos={jobsBox}{1}">Browse environment jobs</a> </p> <ul class="jobs"> <li class="odd"><h4> <a href="http://web.archive.org/web/20091024040900/http://jobs.guardian.co.uk/job/924193/pr-account-director?RSSSearch=0&gusrc=gu_jobs_box_Environment&link=Environment_jbx_vac" name="&lid={jobsBox}{PR Account Director|Environment}&lpos={jobsBox}{2}">PR Account Director</a></h4> <p><span class="employer">fishtank.</span></p> <p><span class="location">berkshire.</span></p> <p><span class="wage">£40000.00 - £50000.00 per annum.</span></p> </li> <li><h4> <a href="http://web.archive.org/web/20091024040900/http://jobs.guardian.co.uk/job/925366/policy-officer-international-development-finance?RSSSearch=0&gusrc=gu_jobs_box_Environment&link=Environment_jbx_vac" name="&lid={jobsBox}{Policy Officer - International Development Finance|Environment}&lpos={jobsBox}{3}">Policy Officer - International Development Finance</a></h4> <p><span class="employer">wateraid.</span></p> <p><span class="location">vauxhall, london with international travel.</span></p> <p><span class="wage">Starting from £40,928 pa.</span></p> </li> <li class="odd"><h4> <a href="http://web.archive.org/web/20091024040900/http://jobs.guardian.co.uk/job/925100/qshe-manager-environment-focusyorkshire?RSSSearch=0&gusrc=gu_jobs_box_Environment&link=Environment_jbx_vac" name="&lid={jobsBox}{QSHE Manager (Environment focus/Yorkshire)|Environment}&lpos={jobsBox}{4}">QSHE Manager (Environment focus/Yorkshire)</a></h4> <p><span class="employer">morgan hunt.</span></p> <p><span class="location">north yorkshire.</span></p> <p><span class="wage">£30000 - £35000 per annum + package.</span></p> </li> </ul> <script type="text/javascript"> //<![CDATA[ function doSearchAllSubmitUK( form ) { var jobsSectionToSearch = 'environment'; var freeText = 'environment'; var searchTextField = document.getElementById( 'freetext-searchalljobs' ); var keywordElem = document.getElementById( 'keyword-searchalljobs' ); var isSectionSearch = function() { return jobsSectionToSearch != ''; } var textIsModified = function() { if( isSectionSearch() ) { return ( searchTextField.value != 'Search all ' + freeText + ' jobs' ); } return ( searchTextField.value != 'Search all jobs' ); } if( !textIsModified() ) { keywordElem.value = ''; if( isSectionSearch() ) { form.action = 'http://web.archive.org/web/20091024040900/http://jobs.guardian.co.uk/jobs/environment'; return true; } form.action = 'http://web.archive.org/web/20091024040900/http://jobs.guardian.co.uk/'; return true; } keywordElem.value = searchTextField.value; if (true) { _hbLink( '{jobsbox-searchalljobs}', '{jobsbox-searchalljobs}{1}' ); } return true; } //]]> </script> </div> </div> <div id="global-jobs-2" class="global-jobs-pane tab-toggle-pane initially-off"> <h3 class="js-hider">USA</h3> <div class="capsule jobsbox"> <form action="http://web.archive.org/web/20091024040900/http://www.guardianjobs.com/" onsubmit="return doSearchAllSubmitUSA( this );"> <fieldset> <input type="text" class="text plain-search" id="freetext-searchalljobs" name="q" value="Search all environment jobs" onfocus="this.value='';"/> <input type="hidden" name="csr" value="environment"/> <input type="hidden" name="keyword" id="keyword-searchalljobs" value=""/> <input type="submit" class="submit" name="go" value="Go"/> <input type="hidden" name="gusrc" value="gu_jobs_box_Environment"/> <input type="hidden" name="link" value="Environment_jbx_go"/> <input type="hidden" name="industry" value="141"/> </fieldset> </form> <p class="find-a-job"> <a href="http://web.archive.org/web/20091024040900/http://jobs.guardian.co.uk/jobs/environment?gusrc=gu_jobs_box_Environment&link=Environment_jbx_brsesec" name="&lid={jobsBox}{Browse environment jobs}&lpos={jobsBox}{1}">Browse environment 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</script> <script> google_max_num_ads = '3'; </script> <div id="google-ads-container" class="environment component capsule advertiser-links" style="display: none;"></div> <script type="text/javascript"> //<![CDATA[ if (true) { generateScriptTag("http://web.archive.org/web/20091024040900/http://pagead2.googlesyndication.com/pagead/show_ads.js"); } // ]]> </script> </div> <div class="related-content"> <h3 class="first" id="relatedInformation">Related information</h3> <div id="keyword-rule-wrapper"> <div class="relatedlinks" class="capsule"> <h3 class="first"><a href="http://web.archive.org/web/20091024040900/http://www.guardian.co.uk/environment" name="&lid={inlineKeyword}{Environment}&lpos={inlineKeyword}{1}">Environment</a></h3> <ul class="relatedlinks-keywords"> <li> <a href="http://web.archive.org/web/20091024040900/http://www.guardian.co.uk/environment/carbonfootprints" name="&lid={inlineKeyword}{Carbon footprints}&lpos={inlineKeyword}{2}" rel="tag">Carbon footprints</a> · </li> 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