The push to reduce U.S. greenhouse gases is pairing clean coal technology with oil production _ highlighting the environmental trade-offs President Barack Obama is willing to make in his quest to curb... more 
The push to reduce U.S. greenhouse gases is pairing clean coal technology with oil production _ highlighting the environmental trade-offs President Barack Obama is willing to make in his quest to curb global warming. (Dec. 23) less 
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Mon, Dec 23, 2013 1:13 AM EST