The Los Angeles-Long Beach area retained its dubious distinction as the nation’s smoggiest region, with ozone pollution getting worse over the past year, according to an annual report by the American ...

El Paso and Los Angeles were among the most polluted areas in the United States last year, according to a new air quality report that evaluated pollution levels around the world in 2025. The report is ...

This story is free to read because readers choose to support LAist. If you find value in independent local reporting, make a donation to power our newsroom today. Planet-heating and health-harming ...

Southern California air quality regulators are reneging on their promise to enact long-delayed rules to curb health-damaging and planet-warming pollution from the ports of L.A. and Long Beach by the ...

Add Yahoo as a preferred source to see more of our stories on Google. Los Angeles has struggled with air pollution problems since before smog became a term. In 1943, smog covered the city so thickly ...

As some people return to the structures spared from Los Angeles wildfires, experts warn that they should be careful of the air inside and especially cautious when cleaning up. Smoke, ash and all the ...

The fires that have ravaged Los Angeles over the past week were larger and burned hotter than they would have in a world without planet-warming fossil fuel pollution, a new analysis suggests. Climate ...

Nevada cities, including Reno, rank among the worst for air pollution, according to the American Lung Association’s latest State of the Air report. Released last week, the 26th annual report found ...