The effects of air pollution on kids "should have parents up in arms" to force changes in air pollution regulations, a reader said. Experts say children exposed to high air pollution levels can lose ...

A second Trump presidency may threaten pending California environmental rules, including a landmark mandate to ban the sale of new, gasoline-powered cars by 2035. If California rules face legal ...

When Cesunica Ivey moved to Southern California to start her lab at the University of California, Riverside, in 2018, one of the first things she did was meet with a local environmental advocacy group ...

Almost four out of every 10 people in the United States live in a place where air pollution is considered bad enough to put their health at risk, the American Lung Association warned in its latest ...

ProPublica is a nonprofit newsroom that investigates abuses of power. Sign up to receive our biggest stories as soon as they’re published. Leer en español. From the urban sprawl of Houston to the ...

Editor's note: This story was initially published Monday, June 5, and has been extensively updated. For today's coverage, please click here. Air quality remained unhealthy for tens of millions of ...

An industry-backed bill to regulate how data from community air monitors is used was given final legislative approval Monday over objections from the U.S. Environmental Protection Agency and activists ...

The ongoing wildfires that erupted across Los Angeles County last week have many residents worried about what they're breathing and how to keep their families safe. More than 5,000 people tuned in ...