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California warns of break from Washington on clean-air rules

California sent a warning shot in a potential showdown with the incoming Trump administration, with the state’s clean-air regulators digging in on mandates for an ever-greater number of electric and fuel-cell cars.

EPA nominee Pruitt to review vehicle emissions rules

Oklahoma Attorney General Scott Pruitt, President-elect Donald Trump's choice to lead the EPA, said he will review the Obama administration's recent

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