Tonight's decision could upend California’s phaseout of gas-powered cars and its decades-long battle against air pollution.

California Governor Gavin Newsom and state officials launched a fierce counterattack on Thursday after the U.S. Senate voted to kill the state's groundbreaking plan to phase out gasoline-powered cars ...

Before the EPA, the US environment was not federally protected. Vintage photos show Los Angeles before regulations limited the damage.

The Republican-majority Senate voted to nullify California's landmark environmental rule that would've banned the sale of new ...

Los Angeles has struggled with air pollution problems ... While LA doesn't look as bad as it did before the Clean Air Act, it still gets smoggy days. This story was originally published in January ...

A hidden air pollutant is discovered by Caltech scientists that may change the way smog is studied in Southern California ...

Today’s decision could upend California’s phaseout of gas-powered cars and its decades-long battle against air pollution.

Under California’s mandate, 35% of new 2026 model cars sold in the state must be zero-emissions, ramping up to 68% in 2030 ...