Climate Change EPA PA

Some 300 environmental activists yell their support for stricter pollution rules proposed by the Environmental Protection Agency during a march to the William S. Moorhead Federal Building in downtown Pittsburgh by some 5000 union members, led by the United Mine Workers of America Thursday, July 31, 2014. Thursday is the first of two days of public hearings being held by the Environmental Protection Agency in Pittsburgh to discuss stricter pollution rules for coal-burning power plants proposed by the EPA. (AP Photo/Gene J. Puskar)

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