Crowdsourced pollution data via smartphones

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Citizens in eleven cities in Europe were recently recruited to help crowdsource pollution measurements, as part of the large-scale research project iSPEX-EU. Participants used their smartphones, an app and a lens called a spectropolarimeter, to collect data about air quality across the continent, which will be used by iSPEX to make comprehensive maps. The project ran for six weeks and saw thousands of measurements taken in Athens, Barcelona, Belgrade, Berlin, Copenhagen, London, Manchester, Milan, Rome, and Toulouse. To contribute, citizens registered their interest, downloaded the free app and were sent an iSPEX lens. Then, on a clear day they placed…

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