Plant manager Neil Dennehy, right. describes how the Colstrip Steam Electric Station produces power from coal as Rep. Steve Daines, R-Mont., listens Monday, July 1, 2013, in Colstrip, Mont. The ... more 
Plant manager Neil Dennehy, right. describes how the Colstrip Steam Electric Station produces power from coal as Rep. Steve Daines, R-Mont., listens Monday, July 1, 2013, in Colstrip, Mont. The 2,100-megawatt facility produces an estimated 17 million tons of carbon dioxide annually and is the second largest coal plant west of the Mississippi. (AP Photo/Matthew Brown) less 
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Associated Press | Photo By Matthew Brown
Mon, Jul 1, 2013 7:37 PM EDT