Heat, Sweat, and Ozone Plague U.S.; All-Time High in Shanghai
July 21, 2017, 5:35 PM
Section: Heat, Fire & Drought
Heat, Sweat, Ozone Plague U.S.
Excessive heat warnings and air quality alerts were plastered over much of the central and eastern U.S. on Friday, extending into the weekend in many areas.
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There aren't enough air quality sensors in the United States, so it's hard to track air pollution. Please help collect this data to keep your family and neighbors healthy.
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