Overall air quality is pretty good in NYC, but street level pollution is nasty. There isn't a day that I don't get huge whiffs of diesel exhaust or a weekend that i don't have to clean off black grime from my windows. Happens less so in cities where you're not surrounded by walls of buildings and heavy street traffic.
I think the air quality in in the city is only good because it gets quickly blown out to sea.
I think the air quality in in the city is only good because it gets quickly blown out to sea.