CNET: Scientists warn air pollution is climbing back to pre-COVID levels

CNET: Scientists warn air pollution is climbing back to pre-COVID levels. “With lockdowns easing comes an unfortunate but expected rise in air pollution. The European Space Agency said Monday that nitrogen dioxide levels have returned to pre-COVID levels in China. According to the EPA, nitrogen dioxide is mainly traced to the burning of fuel and emissions from vehicles and power plants. The gas is connected to lung irritation, acid rain and hazy air quality.”

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