Ai is the best chance of fixing pollution and cleaning up the planet for sure. If they were able to get rid of all the other cars right now and set up everything new with only cars that drove themselves it would be doable. The problem is that first of all wouldn't because we live in a winter climate so right away you're fucked there's unless you put sensors in the road Unless you rebuild every single road okay  it's going to take a long time like you said what i'm saying to you those right now the u.s. doesn't have the money to fix any of the roads they've got.