Article Photos: Obama orders pollution cuts _ but timing uncertain 1/12

FILE - In this July 1, 2013, file photo smoke rises from the Colstrip Steam Electric Station, a coal burning power plant in in Colstrip, Mont. The Obama administration on Monday, June 2, 2014, will roll out a plan to cut earth-warming pollution from power plants by 30 percent by 2030, setting in motion one of the most significant actions to address global warming in U.S. history. (AP Photo/Matthew Brown, File)