Here is the Blacksmith Institute list of World’s Worst Polluted cities in the world
* Sumgayit, Azerbaijan
* Linfen, China
* Tianying, China
* Sukinda, India
* Vapi, India
* La Oroya, Peru
* Dzerzhinsk, Russia
* Norilsk, Russia
* Chernobyl, Ukraine
* Kabwe, Zambia