Despite decades of progress in reducing air pollution, Los Angeles is still the nation ... many experts worry could negatively effect air quality, reversing decades of progress in California.

The iconic skyline of downtown Los Angeles has ... The “State of the Air” report from the association has been handing out grades to American cities based on their air quality for the past ...

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

Air quality alerts often advise sensitive populations such as children to avoid outdoor exposure, but the impacts can be ...

The most heavily polluted places remain on the West Coast, although the Canada wildfires made the air quality for dozens of states in ... Eugene-Springfield, Oregon; Los Angeles-Long Beach; Sacramento ...

A South Coast Air Quality Management District expert offered tips on how to stay safe during summer smog season as hot weather has an adverse affect on air quality.

The Los Angeles metro is once again the worst ... the lowest grade possible and reflective of a poor score that involves the Air Quality Index. “The severity of the problem and the abruptness ...

Despite decades of progress in reducing air pollution, Los Angeles is still the nation's ... many experts worry could negatively affect air quality, reversing decades of progress in California.

The most heavily polluted places remain on the West Coast, although the Canada wildfires made the air quality for dozens ... Oregon; Los Angeles-Long Beach; Sacramento-Roseville; Seattle ...