FILE - In this March 9, 2006 file photo, a large dozer sit ready for work at Peabody Energy's Gateway Coal Mine near Coulterville, Ill. A 10 percent reduction in carbon dioxide emissions will mean a ... more 
FILE - In this March 9, 2006 file photo, a large dozer sit ready for work at Peabody Energy's Gateway Coal Mine near Coulterville, Ill. A 10 percent reduction in carbon dioxide emissions will mean a decline of 180 million tons, or 18 percent, in U.S. coal production, according to Bernstein Research. That would hurt miners such as Peabody Energy, Alpha Natural Resources and Arch Coal. (AP Photo/Seth Perlman, File) less 
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Associated Press | Photo By Seth Perlman, File
Mon, Jun 2, 2014 3:15 PM EDT