Pine Bluffs, WY - JUNE 26: Mexican Carpenter Isidro works on a new home June 26, 2007 in Pine Bluffs, Wyoming. While Wyoming is the least populous of any state in America, it is also a significant polluter. Wyoming's coal-fired power plants produce more carbon dioxide than just about any state in the country. On a per-person basis, Wyoming emits more carbon dioxide than any other state in the country. (Photo by Spencer Platt/Getty Images)
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