Is tire wear => microplastics an environmental concern that has been quantified? This is a new concept to me and I have no idea how to weigh the potential costs of this factor.
You could just put the 3 words without the => between them into some search thing and get many hits. It's significant.
Maybe less so if country roads with low traffic as poster downwards suggested. But tyres are soft, so it seems only logically they are abraded faster by gravel which is harder and has sharper edges, than a more flat surface.
