US air quality report finds a sharp uptick in pollution, with the hardest-hit cities in California
By Jen Christensen, CNN The US saw the highest number of “very unhealthy” and “hazardous” air quality days between 2018 and 2020 than it ever had before, according to a report released Thursday by the American Lung Association. After a steady 23-year decline in US pollution levels through 2017, the American Lung Association’s State of
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