More and more often we make use of “the cloud” – that mysterious place where we store, move, process and analyze data. We keep our photos there. We stream music and videos from there. We do our work there. Perhaps we have a mental image of all of this digital information floating above our heads in some ethereal way: like in a cloud.
There are 35 megacities in the world – metropolitan areas with more than 10 million people. Fifteen of them have populations above 20 million. And many of these teeming metropolises have to contend with some of the worst air pollution on the planet.
