The metropolitan area that encompasses the cities of Phoenix and Mesa also ranks among the worst cities for high-pollution particulate matter days. Studies suggest an increase in wildfires throughout the western U.S. has been a major contributor to the area’s high levels of particulate matter pollution.

Climate change is increasing the number of days people are exposed to hazardous pollution, affecting already disadvantaged communities the most.

An American Lung Association report finds 131 million people are breathing “hazardous” or “very unhealthy” air. The exposure can be life-threatening.

Poor air quality can take a toll on our lungs and overall health. A Cleveland Clinic respiratory specialist explains why it’s important to pay attention to air quality alerts.

More people across the United States – nearly 40% – live in places with unhealthy levels of polluted air, according to a new report from the American Lung Association.

"We have seen impressive progress in cleaning up air pollution over the last 25 years, thanks in large part to the Clean Air Act. However, when we started this report, our team ne

American Lung Association's "State of the Air" 2024 report says extreme heat, drought and wildfire contribute to unhealthy air that plagues many U.S. communities.