A trillion dollars worth of Obama-era greenhouse gas regulations for cars, trucks, and engines will be axed this year, along with the unpopular stop-start feature in vehicles, EPA boss Lee Zeldin plans to announce Tuesday.
The EPA proposal to repeal the 2009 “Endangerment Finding” represents a major rollback of US climate action, and follows President Trump’s Day One Executive Order, “Unleashing American Energy.”
It will be released for public comment before going into effect later this year.

“With this proposal, the Trump EPA is proposing to end 16 years of uncertainty for automakers and American consumers,” said EPA Administrator Zeldin. “Stakeholders have told me that the Obama and Biden EPAs twisted the law, ignored precedent, and warped science to . . . stick American families with hundreds of billions of dollars in hidden taxes every single year.”
Zeldin claims the repeal will save Americans as much as $50 billion annually on cheaper cars by slashing greenhouse gas emissions standards on vehicles, including the Biden electric vehicle mandate.
He was set to unveil the proposal in Indianapolis Tuesday with Secretary of Energy Chris Wright, Indiana Governor Mike Braun, Attorney General Todd Rokita, Rep. Jim Baird, the Indiana Motor Truck Association, and the National Automobile Dealers Association.
“We heard loud and clear the concern that EPA’s greenhouse gas emissions standards themselves, not carbon dioxide which the Finding never assessed independently, was the real threat to Americans’ livelihoods,” said Zeldin.
“If finalized, rescinding the Endangerment Finding and resulting regulations would end $1 trillion or more in hidden taxes on American businesses and families.”
The repeal of the Endangerment Finding likely will face fierce legal challenges from blue states and climate activists. Another obstacle is the fact that Congress codified greenhouse gases as pollutants in 2022 in the so-called Inflation Reduction Act.