In “Smog and Sunshine,” UCLA’s Ann Carlson tells of the scientists, lawyers, government officials and community members ...

Picture it: July 8, 1943, Los Angeles, California. You go outside and are inundated by a mysterious brown haze in the air that smells gaseous. This is unprecedented, and nobody knows what could be ...

The Los Angeles region has some of the most polluted air in the United States, failing to meet standards set by the Environmental Protection Agency for the last decade. Now, Caltech researchers have ...

Traffic heads north on the 405 Freeway on Oct. 1, 2025, as a new era in commuting begins for clean-air vehicles with new rules and uncertainty over how they will affect commute times and traffic.

This story was originally published by CalMatters. Sign up for their newsletters. New household water heaters and heating systems powered by natural gas would be phased out in the Los Angeles basin ...

The major breakthrough in understanding L.A.'s deadly smog came from a surprising place. The major breakthrough in understanding L.A.'s deadly smog came from a surprising place. Corporate sponsorship ...

The summer inversion layer means air pollution stays put in Southern California. We look at the history of smog and what it can teach about the future of global warming. Also, California is starting ...

Temperatures are on the rise and the inversion layer's returning to Southern California. All that exhaust from all those cars is staying with us. Does Los Angeles' experience with smog contains ...