A new report on air quality across the U.S. offers a cloudy prognosis on the long-term health of about 156 million residents who live in areas that received an "F" in smog and soot pollution.

American Lung Association report found that about 156 million people live in counties plagued by high levels of ozone and fine particulate matter

The American Lung Association has revealed that nearly half the U.S. population resided in areas with dangerous levels of air pollution between 2021 and 2023.