You obviously never loved through LA Smog. You never had to stay inside or skip school because the air was too dirty to breathe. Take a look at how it was: https://www.ccair.org/wp-content/uploads/2016/10/LA-smog.jpg

Cars may burn cleaner but they still burn, and there are more of them than ever.

Easing economic pain in exchange for health pain is nonsensical. Breathe from your own tailpipe if its no big deal.