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 ...

Eighty years ago, the enchantment ended. Los Angeles, that magical realm of shimmering natural beauty, was befouled by smog — maybe forever. The mayor, Fletcher Bowron, told Angelenos in 1944 to lower ...