FILE - This March 9, 2010 file photo shows a tanker truck passing the Chevron oil refinery in Richmond, Calif. On Weds., Nov. 14, 2012, California’s largest greenhouse gas emitters will for the first time begin buying permits in a landmark “cap-and-trade” system meant to control emissions of heat-trapping gases and spur investment in clean technologies. The program is a key part of California’s 2006 climate-change law, AB32, a suite of regulations that dictate standards for cleaner-burning fuels, more efficient automobiles and increased use of renewable energy. (AP Photo/Paul Sakuma, File)