but compare the wear of the tires, and weigh tires vs brakes by the amount of "total pollution delivered to the environment", i.e. 20% more wear of something that is 2x as polluting is 40% more pollution. I don't know the numbers or the answer, I'm just saying it's not as simple as your statement makes it out to be.

Why are you just making up numbers then saying "it's not as simple"? Try educating yourself a little first instead of just jumping to conclusions which reinforce your existing biases.

> 20% more wear of something that is 2x as polluting is 40% more pollution

If an equivalent car wore down its tires 20% slower, and those tire particles contributed 2x the intensity of pollution than other types of wear-based pollution, than the increase in produced pollution from that source seems like it would be ~16%, not 40%.

If one car drives 100 km and produces 2 units of pollution per km, that would be 200 units. Another car wearing 20% more would produce 240 units, or roughly ~16% more.