World's 10 Most Polluted Cities
4. Quetta, Pakistan:
Quetta records for 251 micrograms of polluting particles per cubic meter. Quetta is a high-altitude city well-known as the "Fruit Garden of Pakistan" because of its diverse plant and animal life. The city is also a transportation hub known for its railways and airport.
3. Sanandaj, Iran:
Sanandaj in Iran is the third most polluted city in the world. It records for 254 micrograms of polluting particles per cubic meter. It is another city of western Iran famed for its numerous manufacturing industries. They produce cotton, carpets, woodwork, and metal ware. Outside the city is a landscape of beautiful hills and mountains, but the city itself has turned into a sea of smog and commerce.
