Greenhouse Gas Emissions in Texas January 11, 2012, 6:29 p.m. Texas likes to brag that it's big. Turns out that it's a big emitter of greenhouse gases, too. A new federal database shows that in 2010 the Lone Star State's power plants and refineries sent 294 million metric tons of greenhouse gases into the atmosphere - more than twice the amount released by similar facilities in any other state. The data, posted online Wednesday by the U.S. Environmental Protection Agency, allows the public to track emissions from large stationary sources in a variety of ways: by state, location, facility, industrial sector and type of greenhouse gas. Nearly three-quarters of the emissions reported nationally in 2010 came from power plants. Of greenhouse gases released by all industrial and power sources, 95% were carbon dioxide and 4% methane. California power plants and refineries released 71 million metric tons of greenhouse gases, ranking it seventh, behind Texas, Pennsylvania, Florida, Ohio, Indiana and Illinois. Idaho and Vermont reported the smallest quantities. The congressional mandated reporting program was launched in 2009. It does not cover transportation, commercial or agricultural emissions.