EPA recently released its 19th annual report of overall U.S. greenhouse gas (GHG) emissions, showing a 3.4 percent decrease in 2012 from 2011.
This report tracks total annual U.S. emissions and removals by source, economic sector, and greenhouse gas going back to 1990. EPA uses national energy data, data on national agricultural activities, and other national statistics to provide a comprehensive accounting of total greenhouse gas emissions for all man-made sources in the United States.