WASHINGTON — The Trump administration rolled back ambitious Obama-era vehicle mileage standards Tuesday, raising the ceiling on damaging fossil fuel emissions for years to come and gutting one of the United States’ biggest efforts against climate change. The Trump administration released a final rule Tuesday on mileage standards through 2026. The change — after two years of Trump threatening and fighting states and a faction of automakers that opposed the move — waters down a tough Obama mileage standard that would have encouraged automakers to ramp up production of electric vehicles and more fuel-efficient gas and diesel vehicles. “We are delivering on President Trump’s promise to correct the current fuel economy and greenhouse gas emissions standards,” Andrew Wheeler, head of the Environmental Protection Agency, said in a statement Tuesday marking the release. He said the final rule “puts in place a sensible” national program that “strikes the right regulatory balance that protects our environment, and sets reasonable targets for the auto industry.