FILE - In this March 16, 2011 file photo, steam escapes from Exelon Corp.'s nuclear plant in Byron, Ill. Companies that generate electric power with anything other than coal _ and companies that ... more 
FILE - In this March 16, 2011 file photo, steam escapes from Exelon Corp.'s nuclear plant in Byron, Ill. Companies that generate electric power with anything other than coal _ and companies that produce cleaner fuels or efficiency technologies _ are likely to benefit from the Obama Administration’s new proposed limits on carbon dioxide emissions from power plants. (AP Photo/Robert Ray, File) less 
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Associated Press | Photo By Robert Ray, File
Mon, Jun 2, 2014 3:12 PM EDT