Washington Governor Bob Ferguson's office criticized the Senate decision Thursday to block California’s rule banning the sale ...

Under the Clean Air Act, states are generally prohibited from setting their own tailpipe emissions for ... in December was the Omnibus Low-NOx Emissions Rule, which imposes aggressive emissions ...

U.S. Supreme Court justices appeared sympathetic on Wednesday to a bid by fuel producers to challenge California's standards for vehicle emissions and electric cars under a federal air pollution law ...

A waiver from the federal government has long allowed California to set its own stricter tailpipe emissions. But now, fuel companies are suing. On Wednesday, the Supreme Court will weigh whether ...

The move comes a day after the chamber voted to halt California standards to cut tailpipe emissions from medium- and heavy-duty vehicles, as well as curb smog-forming nitrogen oxide pollution from ...

SACRAMENTO, Calif. (AP) — The Republican-controlled U.S. House voted Thursday to block California from enforcing first-in-the-nation rules phasing out the sale of new gas-powered cars by 2035.