Yesterday the Environmental Protection Agency (EPA) announced it was entering into two proposed settlement agreements to regulate greenhouse gas emissions from fossil fuel-fired power plants and oil refineries under the Clean Air Act. The two agreements resolve lawsuits filed against the EPA by several states and environmental groups seeking the imposition of new source performance standards covering greenhouse gas emissions from the two types of facilities. Under the agreement, the EPA will issue proposed regulations governing the two classes of facilities in 2011 and finalize the rules in 2012.