I am all for this. I have always lived in places with clean air, and I get irked at so-called enviornmentalists who live in LA and NYC making onerous rules for the rest of us. Let them clean up their own cities.
Yes, it makes sense. Unfortunately, with liberals there's no guarantee that local laws won't end up being imposed on everyone, anyway.
Personally, I think most cities are so morally and culturally decayed that air quality should be rather low on the list of "improvements." But that's just me. :)