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• The percentage of U.S. GHG emissions covered. The U.S. GHG Inventory provides a comprehensive picture of all GHG emissions and covers 100 percent of man-made emissions in the U.S. The 2010 GHGRP data covers roughly 80 percent of total U.S. GHG emissions. This is because the GHGRP only requires reporting from large direct emitters of GHGs from certain industries and suppliers of certain fossil fuels and industrial gases. Direct emitters in the GHGRP report roughly half of total U.S. emissions; additional GHG data is reported by the suppliers. In addition, 12 new industry groups are required to report 2011 GHG emissions data in 2012 for the first time. The GHGRP does not include GHG emissions from certain diffuse sources such as agricultural soil management and enteric fermentation by livestock.

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