<p>In this July 1, 2013, photo, smoke rises from the Colstrip Steam Electric Station, a coal burning power plant in in Colstrip, Mont. </p>
June 30, 2015
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June 30, 2015 9 p.m.
<p>In this July 1, 2013, photo, smoke rises from the Colstrip Steam Electric Station, a coal burning power plant in in Colstrip, Mont. </p>
June 30, 2015