Every year, more than one million deaths globally occur because of exposure to short-term (hours to days) fine particulate matter (PM2.5) in air pollution, according to a new report, with Eastern Asia ...
The sun sets on Sept. 14, 2020, behind a tower of the 45th Street Colonnade in Fargo, N.D. The sky was especially hazy due to smoke from California wildfires suspended in the upper atmosphere.
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