Add Yahoo as a preferred source to see more of our stories on Google. Los Angeles has struggled with air pollution problems since before smog became a term. In 1943, smog covered the city so thickly ...

The Los Angeles-Long Beach ranked as the nation's smoggiest region in a report released on Wednesday by the American Lung Association, which also faulted the region for short-term and year-round ...

The Port of Los Angeles must significantly improve its management of stormwater and groundwater to ensure that toxic pollutants stay out of the harbor, according to a tentative settlement on Wednesday ...

5 Freeway north of LA is the focus of an updated air quality alert reported at 5:03 p.m. on Wednesday by the National Weather Service. The alert is in effect until Thursday July 10, at 8:15 p.m. “The ...

Los Angeles and much of Southern California were met with a regional air quality alert on Saturday, following July 4th festivities and the state’s largest wildfire of the year. With the Madre Fire ...

The quarterly progress update on the ongoing efforts to reach zero-emissions operations at the Ports of Los Angeles and Long Beach will be presented at 9 a.m. Tuesday, Dec. 9, at Banning’s Landing ...

A motorcyclist in Los Angeles prepares to turn while driving along a street engulfed in a thick haze combined by fog and smog in 1958.Bettmann / Getty For much of its history, the city of stars could ...

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 ...