Reuters: The U.S. Environmental Protection Agency will take one of the biggest hits of any federal agency if the government shuts down this week, operating with under 7 percent of its employees, according to guidance issued by the agency. Among those furloughed would be most workers at the Office of Air and Radiation, which is in charge of writing and implementing most of the EPA's major air pollution rules. The clock would also stop, for now, on the EPA's eagerly-awaited proposal on renewable fuel volume...