Inside The American Electric Power Co. Coal-Fired Power Plant [Getty Images]

Emissions rise from the American Electric Power Co. Inc. coal-fired John E. Amos Power Plant in Winfield, West Virginia, U.S., on Thursday, July 31, 2014. Power plant coal burning by 2020 must decline by 204 million tons, or 24 percent, to meet U.S. Environmental Protection Agency (EPA) greenhouse gas targets announced June 2, Sanford C. Bernstein & Co. analysts led by Hugh Wynne estimated in a July 23 note to clients. Photographer: Luke Sharrett/Bloomberg via Getty Images

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