Rubber tyres on asphalt produce a fair bit of very fine particulate matter, and are currently ubiquitous in vehicles - I imagine this is what fjfaase was referr

Rubber tyres on asphalt produce a fair bit of very fine particulate matter, and are currently ubiquitous in vehicles - I imagine this is what fjfaase was referring to. That said, the contribution is tiny - on the order of 2.5% of total roadside PM10. https://res.mdpi.com/d_attachment/atmosphere/atmosphere-10-00099/article_deploy/atmosphere-10-00099.pdf https://res.mdpi.com/d_attachment/atmosphere/atmosphere-10-0...