[poo-yie]

Pardon my ignorance here. Isn't rubber (used in tires) different from plastics? Honest question. I've always thought of them as being different things. Not that I want micro-rubber particles in my lungs either.

[wonder_er]

Great question. I think because plastic and rubber are both petrolium byproducts, the 'shreds' of both are bad.

I googled, found: > Current tires consist of 19% natural rubber and 24% synthetic polymers (plastics), as well as metal and other materials.

So tires have both rubber and plastics. both are bad, and both get ejected into the environment at a horrific rate. :(