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China smog returns after pandemic cleared the air

The coronavirus pandemic had cleared smog from China's skies for months, but air pollution has returned with a vengeance as factories rush to ramp up output after going idle during the outbreak.

Virus lockdown makes big dent in Paris air pollution: report

France's stay-at-home orders to combat the coronavirus outbreak have produced a 20 to 30 percent decline in overall air pollution levels in Paris, according to a report from the region's air quality monitoring agency.

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