Watch how air pollution moves across Europe

(BBC News, 14 Jan 2019) This is what pollution looks like on a European scale.

The animation shows the concentration and movement through the atmosphere of nitrogen dioxide.

NO₂ is a problem gas that is produced primarily by vehicle exhausts and industrial activity via the burning of fossil fuels.

The map covers a sample period from 5 to 10 January, and describes the behaviour of NO₂ at ground level on an hourly basis.

The worst air quality peaks in the white.

This fascinating insight was produced for the BBC by the Copernicus Atmosphere Monitoring Service (CAMS), which is based at the European Centre for Medium-Range Weather Forecasts (ECMWF) in Reading.

To make this type of animation, CAMS incorporates satellite observations and surface measurements.

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BBC News, 14 Jan 2019: Watch how air pollution moves across Europe