Prefacing this with I don’t know much about this stuff:
I just bought a house and the vent did basically this. Issue was it back drafted into the sofets and made the attic still moist and there was mold. Without knowing what you’re doing I think out the roof is the best.
Check out the blf forums. Reddit also used to have a great flashlight community but I avoid that site now. There are flashlight communities on Lemmy and kbin. Cheule is a good YouTube channel to check out.
Hell yeah! Implement all the policies that favor the rich!
Seriously though $15 means nothing to the rich and electric cars are not an option for most people yet. As others have said, just make public transit better and cheaper.
Source? I have never seen a single car that does this.