This is some sort of sick joke? Right?
Aren’t all the communities/lakes/ski areas above 2,200 feet? Those are high mountains, up to 7,000 or 8,000, right? So you are basically cutting off all access to anything worth doing up there. The economy up there would completely tank. Public transportation would not cut it for getting up there, because people have to haul their gear, and many people have to get supplies and equipment up to their vacation homes and land.
This is going to be a very hot issue.
Apparently there is no reciprocity. Pollution from the Mexican state of Chihuahua pollutes the Big Bend Park of Texas to such an extent that the sun can often barely be seen through the haze.
I live just out of Yellowstone Park. There has been rumors of a coming car ban in YNP for years. This too will happen. The “funny” thing about this is that the granola crunchers wearing their Che T-shirts and unshaved armpits(both m/f) will be the first to go nuts in protests.