Here is a short video I did for the Royal Geographical Society to show how new satellite data can reveal the daily changes to nitrogen dioxide (and other pollutants) in the atmosphere in unprecedented detail. For a longer version of the video and further explanation see here.
James Cheshire is Professor of Geographic Information and Cartography in the UCL Department of Geography and the inaugural director of the UCL Social Data Institute. A world-leading map maker and geographer, his cartographic creations have been enjoyed by millions.