I watch european Purple Air monitors just out of curiosity. Day after day the area around Milano is in pretty bad shape, related to PM 2.5. One of the few areas of western nations where this consistently bad air pollution is still tolerated
Interesting, and unfortunate that some will dimiss hard data provided by the sensors. I wonder how much is related to geography too, with it seeming like all the bad air seems to stack up against the Alps. Right across them in Switzerland, it’s often excellent air.