US cities with worst air pollution ranked: report
Fox News
The U.S. cities with the worst air pollution levels were ranked in a recent report, which concluded that more than 58 million Americans experienced more than 100 days of polluted air in 2020.
Any AQI score between 51 to 100 is listed as "moderate" air quality, with the potential for a risk to some sensitive groups.
PM 2.5 is commonly found in wildfire smoke which has plagued states on both coasts in recent seasons.
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