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On April 18, EPA released the 16th annual U.S. greenhouse gas inventory. The final report 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.

The Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990-2009 tracks annual greenhouse gas emissions at the national level and presents historical emissions from 1990 to 2009. The inventory also calculates carbon dioxide emissions that are removed from the atmosphere by “sinks,” e.g., through the uptake of carbon by forests, vegetation and soils. This inventory, prepared in collaboration with federal agencies, is the latest submitted by the United States to the Secretariat of the United Nations Framework Convention on Climate Change (UNFCCC).  The UNFCCC sets an overall global framework for nations to address climate change. The final report takes into consideration comments received from stakeholders across the country.