It's dust, we breathe it in. This is intentional. Bring back wood wheels.

If you're concerned about the rubber and plastic particles in our environment, then ask yourself another big question: where did all the radionuclides and other radioactive material from above ground nuclear testing go? And what about the radioactive particles from Fukushima and Chernobyl?

It all ends up in the water system eventually but that is insignificant to the amount of trash That is on the planet. You can't go anywhere without finding some sort of man-made trash.

Lol, as I pulled into my driveway yesterday afternoon and seeing the very noticeable black tire marks on the concrete I thought of the same thing. Not that I hadn’t thought of it before, but since we haven’t had rain in a while the black was laid down pretty thick. And that’s at very low speed without much tire turning. I can’t imagine we don’t breathe a lot of it in and much of it ends up in the water I would think. As with the (((protocols))), death by a thousand cuts.

I remember my grandfather asking something similar about car tires 20+ years ago. His determination is that a small amount of rubber isn't being worn off the tires but rather it's burning.

Years later I am more inclined to believe that small amounts are being worn over time but the particulate size is small enough that it's being washed away into our waterways and ground water.

Condoms.

It covers the roadways and the sides of the roads. Much is washed away. It's heavy and becomes part of silt layers or is filtered during water processing.

I’ve read somewhere that we breathe it all in. Supposedly there’s huge amounts of rubber micro particles in the air especially around major roads.

Ref: https://poal.co/s/Environment/635994

I had the same question months ago and most of it becomes kind of black powder

Keep your windows up when driving, use your cabin air blower. At least it goes through some kind of filter.