Nearly half of all Americans live in places with failing grades for air pollution
About 46% of U.S. residents — 156 million people — lived in areas with unhealthy air quality that earned “F” grades from the American Lung Association for ozone or particle pollution.
About 46% of U.S. residents — 156 million people — lived in areas with unhealthy air quality that earned “F” grades from the American Lung Association for ozone or particle pollution.
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