The American Lung Association report finds that climate events are causing more people in the U.S. to breathe toxic air even as other pollution falls.

Despite improvements in air quality in past decades, 156 million Americans still breathe in too much soot or ozone, says the annual State of the Air report from the American Lung Association.

Los Angeles is the city with the worst ozone pollution in the country, while Bakersfield is the metropolitan area most affected by particulate matter