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Or you could just make a city car-free. There are so many benefits besides fewer particles in the air. People can walk and cycle safely. Kids can play in the streets. The atmosphere is so much nicer, since people are not isolated by walls around them. I have lived in a city with a (nearly) car-free city center (+ separate bike lines for many roads outside the center) for most of my adult life [1] and it is just glori…
Kids can't play in streets as now the new predators are cyclists who don't slow down or get down of their bikes. Besides, cars are a staple for families, and hardly substituable. Good luck doing groceries for 6 without one.
I suggest this yt channel as a start to open your eyes as to how yes, another world is possible https://www.youtube.com/watch?v=ORzNZUeUHAM