Environment News Service: Total U.S. greenhouse gas emissions were 7,282 million metric tons carbon dioxide equivalent in 2007 – an increase of 1.4 percent from the 2006 level, federal government figures show. The figures are contained in an annual report titled, “Emissions of Greenhouse Gases in the United States 2007,” released today by the Energy Information Administration, the independent statistical and analytical agency within the U.S. Department of Energy. Since 1990, U.S. greenhouse gas …