Although plastic particles in the air are increasingly coming into focus, knowledge about their distribution and effects is still limited. Chemical analyses from Leipzig now provide details from Germany for the first time: Around 4% of the particulate matter consists of plastic. Around two-thirds of this comes from tire abrasion.
i did some write up once on air pollution concentration by geography in the he built environment and one of the heuristics i took away from it was not to live near industrial processes, combustion, or high traffic roads. and try to have lots of plants/trees around, because they filter and immobilize shit.
roads really stood out.