W.A. Parish Electric Generating Station, Thompsons, Texas.

Operated by NRG Texas Power, LLC. Annual carbon dioxide emission: 17.8 million metric tons.

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Photo: David J. Phillip/AP


Gibson Station, Gibson County, Indiana.

Operated by Duke Energy Indiana Inc. Annual carbon dioxide emission: 16.9 million metric tons.

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Photo: Duke Energy


General James M. Gavin power plant, Gibson County, Indiana.

Operated by Ohio Power Company. Annual carbon dioxide emission: 16.6 million metric tons.

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Photo: American Electric Power/AP


FirstEnergy's Bruce Mansfield plant, Shippingport, Pennsylvania.

Operated by FirstEnergy Generation Corp. Annual carbon dioxide emission: 16.4 million metric tons.

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Photo: Keith Srakocic/AP


Monroe Power Plant, Monroe, Michigan.

Operated by Detroit Edison Co. Annual carbon dioxide emission: 16.4 million metric tons.

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Photo: Duke Energy


Navajo Generating Station, located on the Navajo Indian Reservation near Page, Arizona.

Operated by Salt River Project. Annual carbon dioxide emission: 15.9 million metric tons.

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Photo: Ross D. Franklin/AP


Rockport Generating Station, Rockport, Indiana.

Pperated by Indiana Michigan Power Co. Annual carbon dioxide emission: 15.4 million metric tons.

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Photo: ValleyWatch


Jeffrey Energy Center, Emmett, Kansas.

Operated by Westar Energy Inc. Annual carbon dioxide emission: 14.7 million metric tons.

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Photo: Orlin Wagner/AP


Plant Bowen, Euharlee, Georgia.

Operated by Georgia Power Co. Annual carbon dioxide emission: 14.2 million metric tons.

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Photo: Sam Nash/Wikimedia Commons


John E. Amos Power Plant, Winfield, West Virginia.

Operated by Appalachian Power Co. Annual carbon dioxide emission: 13.9 million metric tons.

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Photo: Harry Schaefer/Wikimedia Commons


Four Corners Power Plant, Farmington, New Mexico.

Operated by Arizona Public Service Co. Annual carbon dioxide emission: 13.8 million metric tons.

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Photo: Susan Montoya Bryan/AP


Top photo: Jeffrey Energy Center coal-fired power plant, Kansas – Charlie Riedel/AP