i would trade the smog for clean air any day.
i go moutain biking occassionally about 20 minutes outside of LA, and sometimes when i'm driving back, you can see a literal cloud of grey sitting on the city. the closer you get, the more the edges become less defined, of course. it's weird to see it like that and know that i go into that cloud to live.
but, hey - cg is worth it!