Coal-fired power plants to close after new wastewater rule

FILE - Smoke billows from the Conemaugh Generation Station in New Florence, Pa., Feb. 6, 2007. Climate change isn’t what’s driving some U.S. coal-fired power plants to shut down. It's the expense of stricter pollution controls on their wastewater. Those that intend to close include two of Pennsylvania's largest coal-fired power plants, Keystone and Conemaugh outside Pittsburgh, which said they will stop using coal and retire all of their generating units by Dec. 31, 2028, according to regulatory notices obtained separately by The Associated Press.