The EPA has approved California's gas car ban, allowing the state to require all cars to be EVs, hydrogen-powered, or plug-in hybrids by 2035.
The regulation, known as Advanced Clean Cars II, will have a seismic impact on the U.S. auto market, with 11 other states committed to adopting the regulations.
However, the EPA waiver is unlikely to survive Trump's next term as president, as he has promised to end the 'EV mandate.'
California's ability to impose tighter emissions standards has been long-standing, but the EPA approval is necessary for many of its environmental regulations.