Rocky Mountain Power’s parent company wants to reduce carbon by 98% by 2050, but environmentalists say it’s not enough

(Jeff Gearino | Casper Star-Tribune via AP) Steam rises from the huge boiler units at the Jim Bridger Power Plant east of Rock Springs, Wyo., in 2006. PacifiCorp will start the process of ending coal-fueled operations at the Jim Bridger units, but will seek permitting for a natural-gas conversion of the units by 2024.