2011 U.S. Greenhouse Gas Inventory Report -- EPA

This report by the EPA shows overall emissions during 2009 decreased by 6.1 percent from the previous year. This downward trend was attributed to a decrease in fuel and electricity consumption across all U.S. economic sectors. Total emissions of the six main greenhouse gases in 2009 were equivalent to 6,633 million metric tons of carbon dioxide. These gases include carbon dioxide, methane, nitrous oxide, hydrofluorocarbons, perfluorocarbons and sulfur hexafluoride. The report indicates that overall emissions have grown by more than 7.3 percent from 1990 to 2009. Emissions in 2009 represent the lowest total U.S. annual GHG emissions since 1995. These numbers reflect the most up to date data at the time of publication.