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The North American ( NASA ) and European ( ESA ) space agency satellites have detected in recent weeks a "significant" drop in nitrogen dioxide (NO2) levels in China's airspace. A change that relates, at least in part, to the economic slowdown caused by the outbreak of coronavirus .
From the space agency point out the various quarantines that have been carried out in the country as the main causes. The first one arrived in Wuhan on January 23 with the closure of public transportation in and out of the city as well as the closure of local businesses to prevent the spread of the Covid-19 virus.
According to NASA scientists, the reduction of NO2 contamination was evident for the first time near Wuhan , but later spread throughout the country.
The maps compare pollution levels in China from January 1 to 20, 2020 (before quarantine) and from February 10 to 25.
From the agencies they have also shared several aerial images where the levels of pollution in the city of Wuhan are compared.
"This is the first time I see such a drastic fall in such a wide area during a specific event," said Fei Liu, an air quality researcher at NASA's Goddard Space Flight Center.
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