Quarantined countries show record in air quality

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Pollutants drop in Wuhan, China. Photo: NASA PARIS: While the world is battling against the coronavirus pandemic by shutting factories and confining people to their homes, air quality is improving. Images by the US space agency NASA are clear, in February the concentration of nitrogen dioxide (NO2) fell dramatically in Wuhan, China, the epicentre of the COVID-19 pandemic, passing from an indicator that was red/orange to blue.

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