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

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

There are 25 million more people living with bad air than last year's report showed, according to air quality data from the ...

The Republican-majority Senate voted to nullify California's landmark environmental rule that would've banned the sale of new ...

How Southern California Wildfires Impact Air Quality, Smoke Damage, and Insurance Coverage - The Southern California ...

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.

Jennifer Lopez spends quality time with her daughter Emme Muñiz taking her on a 'girls-only' shopping trip in Los Angeles.

Just up the road, San Francisco is undergoing a civic revival. New leadership has embraced pragmatic policies, tough love, and a renewed sense of civic pride. Encampments and open-air drug markets are ...

Nevada cities, including Reno, rank among the worst for air pollution ... Eugene-Springfield, Oregon; Los Angeles-Long Beach; Sacramento-Roseville; Seattle-Tacoma, Washington; Reno-Carson City ...

The Los Angeles-Long Beach metropolitan area had ... Eduardo Munoz Alvarez Getty Images via TNS Did air quality improve in Sacramento? Fresno? Out of the California cities that ranked the worst ...

Americans have been living with questionable air quality longer than they know ... Nevada-California, Los Angeles-Long Beach, California, Yakima, Washington, Seattle-Tacoma, Washington, and ...