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.

The report found that people of color are more than twice as likely to live in a community with high ozone and particulate pollution, compared with white people.

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.