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 ...

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It’s a title nobody wants, but the Los Angeles-Long Beach metropolitan area was again the most ozone-polluted region in the nation — with Western states also continuing to outpace the East in terms of ...

The Los Angeles-Long Beach metropolitan area has the worst smog pollution in the nation — and among the worst pollution overall — according to a new report from the American Lung Association. 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 ...

Light pollution significantly affects our ability to view the night sky and poses a threat to future generations' access to ...