Studies find global COVID-19 lockdowns have significantly reduced PM2.5 and NO2 pollution, but ozone up
Green Car Congress
MAY 12, 2020
Nitrogen dioxide is a highly reactive gas produced during combustion that has many harmful effects on the lungs. The gas typically enters the atmosphere through emissions from vehicles, power plants, and industrial activities. For comparison, columns over the same time periods are shown for 2019. Shi and Brasseur.
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