Environment News Service: California Attorney General Edmund G. Brown Jr. once again is urging the U.S. Environmental Protection Agency to use its authority under the Clean Air Act to combat climate change. With U.S. greenhouse gas emissions rising year after year, according to a report issued this week by the U.S. Energy Department, and with the UN’s annual climate conference now taking place in Poland, Brown and other attorneys general say this is the time for the EPA to protect the climate. “After …