They barely improve noise pollution, the loudest factor on a moving car are the tires. If you use electricity out of a coal powered power plant you just outsource the air pollution. And I can’t imagine that it is healthy to live around a the mines that are needed to get all the ressources to build the battery and the car itself.
This is worse then ‘nothing is perfect’, this is lying to yourself to continue to fuck up the planet and fuck up people who are not you. Congratulations on your “cleaner city”.
Edit: maybe tell me where I am wrong instead of just downvoting. I think I have a valid point to diskuss.