Nice charts and graphics here https://ig.ft.com/india-pollution/?...HDXSdv6Rf_o8KqzIW_8zabF_CdboEd2SkCYkFTuM41i_E
I am sure there's a lot of locality things with it. Most countries are big, and even with India there are many parts that are fine, and most of the pollution in most countries then to concentrate in certain areas. In the US you get stuff like the Salt Lake City area where it's a valley and everything just kind of collects there and sits.
