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The most polluted cities
1. ?? Bishkek
2. ?? Mumbai
3. ?? Wuhan
4. ?? Dhaka
5. ?? Karachi
6. ?? Calcutta
7. ?? Delhi
8. ?? Lahore
9. ?? Tehran
10. ?? Chengdu
The most polluted cities
1. ?? Bishkek
2. ?? Mumbai
3. ?? Wuhan
4. ?? Dhaka
5. ?? Karachi
6. ?? Calcutta
7. ?? Delhi
8. ?? Lahore
9. ?? Tehran
10. ?? Chengdu