Air pollution poses threats across much of US as climate change erodes regulation gains

Of Americans live in places with unhealthy levels of air pollution according to an annual report.
While air quality has improved in some areas, especially regarding ozone pollution, particle pollution has spiked to record levels affecting nearly 64 million people.
The impact of climate change, including worsening heat waves, droughts and wildfires, has offset regulation gains and improvements in standards following the Clean Air Act.
The American Lung Association report calls on the Biden administration to take further action to curb national air pollution and address health inequities as communities of color face disproportionate exposure.
California and Western states are experiencing deteriorating air quality, with major cities leading as the most polluted in the country.