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Coronavirus, in a month down the smog on the North of Italy
After nearly a month of restrictions, red areas, and closures of schools and activities imposed by the coronavirus, the pollution in the north of Italy is significantly lowered. The levels of nitrogen dioxide, a marker of pollution, were reduced clearly as shown in the images of satellite Sentinel 5 of the european programme Copernicus, managed by the European Commission and the European Space Agency (Esa). The photos were published on Twitter by Santiago Gassò , a researcher from the University of Washington and Nasa.

The sensors Tropomi (Tropospheric Monitoring Instrument) on board of the satellite have detected the progressive reduction of the cloud of red nitrogen dioxide, harmful gas emitted by burning fossil fuels, especially from motor vehicles and from industrial facilities.

A similar effect has been photographed by satellites at the beginning of march in China, where levels of nitrogen dioxide have decreased by 30%, through the images collected from Nasa and from the satellites, monitoring of the pollution of the european space Agency (Esa).

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