Today's Highlights | April 30, 2014 Share Share this on Facebook (Opens in a new window) Share this on Twitter (Opens in a new window) Share this via Email A plume of exhaust extends from the Mitchell Power Station, a coal-fired power plant located 20 miles southwest of Pittsburgh, on September 24, 2013 in New Eagle, Pennsylvania. ( Jeff Swensen / Getty ) Produced by PRI and WNYC