In this May 1, 2018, file photo, the Richmond, Va., city skyline is seen in the horizon behind the coal ash ponds along the James River near Dominion Energy's Chesterfield Power Station in Chester, Va. In the first first major action to address toxic wastewater from coal-burning power plants, the Environmental Protection Agency is denying requests by three Midwest power plants to extend operations of leaking or otherwise dangerous coal ash storage ponds. (AP Photo/Steve Helber, File)
