The Los Angeles region has some of the most polluted air in the United States, failing to meet standards set by the ...

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

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 since before smog became a term. In 1943, smog covered the city so thickly that residents thought they were under a chemical attack.

Los Angeles has struggled with air pollution problems since before smog became a term. In 1943, smog covered the city so thickly that residents thought they were under a chemical attack. The creation ...

The Los Angeles region has some of the most polluted air in the United States, failing to meet standards set by the Environmental Protection Agency ...

Congress may stop California from implementing its first-in-the nation rule banning the sale of new gas-powered cars by 2035.

In terms of smog, Los Angeles carries a unique distinction. "We have the highest levels in the U.S.," said air quality assessment manager Scott Epstein with the South Coast Air Quality Management ...