California Air Resources Board Chair Mary Nichols attends a California Electric Transportation Coalition VIP Tour at the Los Angeles Auto Show on Friday Nov. 30, 2012, in Los Angeles. (Photo by Todd Williamson/Invision for Better World Group/AP Images)

Associated Press
California Air Resources Board Chair Mary Nichols attends a California Electric Transportation Coalition VIP Tour at the Los Angeles Auto Show on Friday Nov. 30, 2012, in Los Angeles. (Photo by Todd Williamson/Invision for Better World Group/AP Images)
California Air Resources Board Chair Mary Nichols attends a California Electric Transportation Coalition VIP Tour at the Los Angeles Auto Show on Friday Nov. 30, 2012, in Los Angeles. (Photo by Todd Williamson/Invision for Better World Group/AP Images)
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