To clean up coal, Obama pushes more oil production

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Clean Coal Conundrum
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Clean Coal Conundrum
In this Oct. 22, 2013, photo, one of several warning signs line the secured at Denbury Resources Inc.'s, Tinsley Field facility in Tinsley, Miss. Denbury Resources hopes to bring new life to old oil fields by pumping in carbon dioxide to force additional oil to the surface. Power companies sell the carbon dioxide to oil companies, to pump into old oil fields to force more crude to the surface. (AP Photo/Rogelio V. Solis)