I'm not for heavy emissions regulation. I always have a car or two with collectors plates. However, you'll are being dishonest if you think modern cars don't help the air. If I'm on the road and a classic or 1981 F150 is in front of me it STINKS. And please think back to a covered parking structures, with your eyes burning. I like advancements. I hate the regulations that stop you from hot rodding your own property. Some cars actually have cleaner exhaust than the air they take in. That is awesome and I like that. But let the market drive it.