the air quality sensors arrive

 In 2020, Development, Sonic Kayaks
Finally the air pollution sensors have arrived. COVID delayed the delivery from China to the Polish suppliers and then to here, and so they have taken 7 weeks to arrive. In locked down Berlin, we consider it an essential work outing, so I cycle to a spot on the old wall where Sukandar is waiting and in gloves with arms outstretched I pass him the unopened package and we pedal away. All pretty clandestine.
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raspberry pigraph visualizing the info