A worker stands in the coal yard at the American Electric Power Co. (AEP) coal-fired John E. Amos Power Plant in Winfield, West Virginia, U.S., on Wednesday, July 18, 2018. American Electric Power Co., Duke Energy Corp., and others say they can't recoup money they spent to meet requirements to cut mercury and other air toxics from their facilities and therefore want the Environmental Protection Agency (EPA) to retain the Mercury and Air Toxics Standards (MATS) rule as is. Photographer: Luke Sharrett/Bloomberg