Estimates seem to be <10%, and I believe even that was by mass, so much less penetrating. It is an issue, and I don't want lots of cars even if electric, but i

Estimates seem to be <10%, and I believe even that was by mass, so much less penetrating. It is an issue, and I don't want lots of cars even if electric, but if you are weighing them as having similar air pollution, it's probably fearmongering, or fantasyland where cars don't have deteriorating emission control.