• Updated

Cars drive in an afternoon traffic jam in a high air pollution in Tehran, Iran, Sunday, Dec. 7, 2025. (AP Photo/Vahid Salemi)

President Donald Trump is expected to announce a proposal to weaken vehicle mileage rules for the auto industry. That would ease pressure on automakers to control pollution from gasoline-powered cars and trucks. Trump is set to announce the plan later Wednesday. The proposal would significantly reduce fuel economy requirements through the 2031 model years. Those requirements set rules on how far new vehicles need to travel on a gallon of gasoline. Word about Trump's impending action comes from several people familiar with the White House plans. They're not authorized to discuss the matter publicly because the proposal hasn't been announced and spoke on condition of anonymity.

  • Updated

FILE - Emissions rise from the smokestacks at the Jeffrey Energy Center coal power plant as the suns sets, near Emmett, Kansas, Sept. 18, 2021. (AP Photo/Charlie Riedel, File)

  • Updated

FILE - Environmental Protection Agency Administrator Lee Zeldin speaks during a cabinet meeting with President Donald Trump, Aug. 26, 2025, at the White House in Washington. (AP Photo/Mark Schiefelbein, File)