Dutch scientists are putting together remarkable maps showing pollution over Europe and other regions of the globe.
…presenting maps it is developing to track nitrogen dioxide (NO2).
The gas – which comes from motor vehicle exhausts, power plants and industry – is an important precursor in the production of ground-level ozone, part of the photochemical smog that can blight city air, particularly in summer.
BBC: Europe’s pollution hotspots shown »
Link to map »