FILE PHOTO: Equipment used to capture carbon dioxide emissions is seen at a coal-fired power plant owned by NRG Energy in Thomspsons, Texas, U.S. on January 9, 2017. REUTERS/Ernest Scheyder
FILE PHOTO: Equipment used to capture carbon dioxide emissions is seen at a coal-fired power plant owned by NRG Energy in Thomspsons, Texas, U.S. on January 9, 2017. REUTERS/Ernest Scheyder