FILE - In this March 9, 2010, file photo, a tanker truck passes an oil refinery in Richmond, Calif. Vowing to keep the United States on track to meet its emissions-cutting target even without the U.S. government's support, more than a dozen governors representing nearly 40 percent of the U.S. economy by Tuesday, June 6, 2017, had pledged themselves to stay in the climate-change fight despite the Trump administration's withdrawal from the Paris climate accords last week. (AP Photo/Paul Sakuma, File)
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