4 ms·
If the particles were coming from the road then roads would wear in very visible ways. But we don't actually see that kind of wear. Roads don't typically have
by ars 7y ago
If the particles were coming from the road then roads would wear in very visible ways.
But we don't actually see that kind of wear. Roads don't typically have grooves on them where the cars go that are lower than the middle which doesn't have tires driving over it.