FILE - This March 9, 2010 file photo shows a tanker truck driving by the Chevron oil refinery in Richmond, Calif. The California Air Resources Board was expected to pass a key piece of the state’s ... more 
FILE - This March 9, 2010 file photo shows a tanker truck driving by the Chevron oil refinery in Richmond, Calif. The California Air Resources Board was expected to pass a key piece of the state’s 2006 climate law, called AB32, at its meetings Thursday, Dec. 16 or Friday, Dec. 17, 2010. If it passes, power plants, refineries and other major greenhouse gas emitters will have pollution capped by new regulations being considered by the regulatory agency. The new rules set up the nation's most extensive carbon trading market that officials hope will provide a financial incentive for the state's worst polluters to cut emissions. less 
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Associated Press | Photo By Paul Sakuma, File
Fri, Dec 17, 2010 3:25 AM EST