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Apr 25, 2019, 1:19 pm92 pts
Grist
If air quality were college, the U.S. would have just flunked out. Over 40 percent of Americans, or 141 million people, live in counties that received an ‘F’ grade for unhealthy air, according to a new report. For the past two decades, the American Lung Association has put out an annual summary of air…
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