Nearly 120 million people in US exposed to unhealthy levels of soot and smog – report

American Lung Association's study also found great disparity between coasts, with 10 of 11 most polluted counties in California

The climate crisis has upended progress on improving air quality, with one in three Americans currently living in areas with harmful levels of pollutants known to increase the risk of medical emergencies, pregnancy complications and premature death, new research reveals.

Almost 120 million people in the US are still exposed to unhealthy levels of soot and smog, according to the annual report by the American Lung Association (ALA), which found that people of color are almost four times more likely to live in the most polluted places than white Americans.