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 ...

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 ...

A new study reveals that premature deaths and illnesses from air pollution related to gas and oil operations disproportionately affect Black, Indigenous, Asian and Latino communities. California ...

A new study finds that bright lights at night change wildlife behavior at the edge of cities more than noise does, based on more than 35,000 days of camera footage in California’s San Mateo and Orange ...

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 ...