Reuters: U.S. emissions of the main greenhouse gas — carbon dioxide — from energy sources, such as gasoline, diesel and coal, fell a record 2.8 percent last year as the recession hit consumer demand for fuel, the government said on Wednesday. Energy-related emissions of carbon dioxide in 2008 fell 165 million tons from the previous year to 5,802 million tons, said the Energy Information Administration, the statistics branch of the Department of Energy. Total U.S. energy consumption dropped …