In April 2012, the U.S. Environmental Protection Agency (EPA) released its 17th annual U.S. greenhouse gas (GHG) emissions inventory, The Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990-2010. The report shows overall GHG emissions in 2010 increased by 213 million metric tons or 3.2 percent from the previous year, despite the sluggish economy. According
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