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  <h2 class="microsite-name">Greenhouse Gas (GHG) Emissions</h2>  
  
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<p><a href="https://wcms.epa.gov/ghgemissions/overview-greenhouse-gases">Learn more about GHGs »</a></p>
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<p>Read the <a href="/newsreleases/epa-releases-greenhouse-gas-emissions-data-large-facilities">Press Release&nbsp;»</a>&nbsp;<br>
	Explore the data through our <a href="http://ghgdata.epa.gov/ghgp/main.do">map app, FLIGHT&nbsp;»</a>&nbsp;<br>
	See the <a href="/ghgreporting/ghgrp-reported-data">Data Highlights&nbsp;»</a></p>
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<p><a href="https://wcms.epa.gov/energy/greenhouse-gas-equivalencies-calculator">Explore the&nbsp;GHG Equivalencies Calculator&nbsp;»</a></p>
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<p><a href="/ghgemissions/household-carbon-footprint-calculator">Estimate your household GHG emissions, and learn how to shrink your carbon footprint »</a></p>
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      <h1  class="page-title element-invisible">Greenhouse Gas (GHG) Emissions</h1>
      
    
            
    
    
    
  
    

                  

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      <h2 class="pane-title">What are the main GHGs?</h2>
  
  
  
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    <p><a href="/ghgemissions/overview-greenhouse-gases"><span
    class="figure image file file-image file-image-jpeg left view-mode-full" style="width:103px;"><img alt="molecule of gas" height="68" width="103" class="left media-element file-full" typeof="foaf:Image" src="/sites/production/files/styles/large/public/2016-01/icon_ghgoverview.jpg" /></span></a><strong><a href="/ghgemissions/overview-greenhouse-gases">Overview of Greenhouse Gases »</a></strong><br />
	Learn about the most important GHGs and opportunities for reducing emissions.</p>
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      <h2 class="pane-title">Where do GHGs come from?</h2>
  
  
  
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	See the human activities that add GHGs to our atmosphere and options to cut emissions.</p>
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    class="figure image file file-image file-image-png view-mode-block_header" style="width:289px;"><img alt="Icon for national emissions." height="127" width="289" class="media-element file-block-header" typeof="foaf:Image" src="/sites/production/files/styles/block_header/public/2016-05/national.png" title="" /></span> Review <a href="/ghgemissions/us-greenhouse-gas-inventory-report-1990-2014"><em>EPA's Inventory of U.S. Greenhouse Gas Emissions and Sinks</em></a> report.<br />
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    class="figure image file file-image file-image-png view-mode-block_header" style="width:289px;"><img alt="Icon for individual carbon footprint estimates." height="127" width="289" class="media-element file-block-header" typeof="foaf:Image" src="/sites/production/files/styles/block_header/public/2016-05/individual.png" title="" /></span> Use the <a href="/ghgemissions/household-carbon-footprint-calculator">Individual Emissions Calculator</a> to estimate your carbon footprint.<br />
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