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.

A new report from the American Lung Association shows that Phoenix's ozone problem is worsening, while its particulate pollution remains high.

Breathing the air in nearly half of the United States could be putting your health at risk. A new American Lung Association report shows that 156 million people live in areas with unhealthy air. The group’s annual "State of the Air" report found that smog and soot pollution are getting worse,