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Q413. What percentage of total U.S. GHG emissions is covered in the GHG Reporting Program?
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A413. The U.S. GHG Inventory is EPA's official source of total U.S. emissions. The Inventory is developed using (primarily) top-down methods and covers all sectors of the economy. Based on the Inventory: electricity generation accounts for approximately 35% of U.S. emissions, transportation accounts for approximately 25%, industry accounts for approximately 20%, commercial and residential sources account for approximately 10%, and agriculture accounts for less than 10%. For more information: http://www.epa.gov/climatechange/ghgemissions/sources.html. 

The GHG reporting program (GHGRP) is developed using bottom-up methods and covers roughly 85 to 90 percent of total U.S. GHG emissions. This includes direct emissions data reported by stationary sources - including nearly all emissions from electricity generation and most emissions from industry which account for roughly 50% of total U.S. emissions. This also includes GHG data reported by suppliers of fossil fuels and industrial gases - which accounts for the vast majority of emissions from transportation, commercial and residential sources, roughly 35-40% of total U.S. emissions. The GHGRP does not include emissions from the agriculture and land use sectors, or other small sources of emissions. Note that the data for [direct emitting stationary sources|http://ghgdata.epa.gov/ghgp/main.do#/facility/?q=Facility%20or%20Location&fid=&sc=0&so=0&ds=SE] stationary sources is housed in a separate section of FLIGHT from the [suppliers of fuels and other industrial gases|http://ghgdata.epa.gov/ghgp/main.do#/facility/?q=Facility%20or%20Location&fid=&sc=0&so=0&ds=S]. The default view of the GHG data in FLIGHT includes emissions reported by direct emitters only. For more information: http://www.epa.gov/ghgreporting/ghgdata/inventory.html.

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Source: EPA Data Publication FAQs [http://www.epa.gov/climatechange/emissions/ghgdata/faq.html#q1], revised by B. Cook, 2/6/2013

Approval / Publishing History: Version 4, Approved by B. Cook, 2/6/2013

Expiration: none

Relevant Subpart/Component: GHG Data and Publication
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