One of the images that impressed me most in my life was flying down the east coast of China, equivalent distance from Cape Cod to Florida, and seeing nothing but a Venus-like hellscape of smog. Wasn't any better on the ground. It was as if they had combined the worst aspects of Las Vegas development with Charles Dickens era London.
I am not at all eager to go back. I know there's lot's o' money sloshing around there, but I also don't care to spend my time in an airport smokers cage, which is basically what that place is.