Despite cleaner cars on the road, a University of California, Riverside study shows that higher speed limits can make city air dirtier. The study compares auto emissions data collected in both the Los Angeles and Salt Lake City metro areas...

Storms now pounding Southern California are raising the specter of more danger for residents -- debris flows in areas already reeling from devastating fires. Debris flows are like mudslides, except much faster and more destructive, as they contain a mix...

Many phone apps offer general but nonspecific information about airborne particles. To help increase public safety amidst LA fire season, scientists are making new, real-time, advanced air pollutant measurements available online for free to the public. The Atmospheric Science and...

As the Eaton and Palisades fires continue to burn past the more than 38,000 acres they’ve already consumed, the time is right for a conversation about what led up to this disaster. In the short term, displaced homeowners and renters...