FILE - In this Thursday, July 16, 2015, file photo, a customer re-fuels her car at a Costco in Robinson Township, Pa. Auto industry executives say even though President Donald Trump may weaken U.S. fuel economy requirements, they’ve already invested billions in efficient vehicles that they’ll continue to sell. Because other countries are raising pollution and mileage standards, they will keep researching how to make gasoline engines more efficient and developing cheaper and longer-range electric and hydrogen fuel cell vehicles for the future. (AP Photo/Gene J. Puskar, File)
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