My EV is around 25 % heavier than comparable ICE vehicles, but it only uses the disc brakes to stop the car from walking pace and hold it in place. I wouldn't be surprised if the amount of brake dust was less than 5 % of what my previous car emitted.
But then you have much more tire dust, since it rises rather exponentially and not linearly with mass of the vehicle. Overall more health-friendly but not as much as people(owners) like to think.
