2. Can you believe this!!! Overcrowding In a Swimming Pool

3. Overcrowding

6. The largest cities Tokyo 35,000,000

7. The largest cities Seoul 10,370,000

8. The largest cities Mumbai Bombay 23,400,000

9. The largest cities Delhi 9,000,000

10. The largest cities Shanghai 20,000,000

11. The largest cities Mexico City 22,000,000

12. The largest cities Sao Paulo 圣保罗 33,000,000

13. Why do People Move to Cities?

14. Effects of Urbanization （城市化）

18. All people have the right to liberty and safety, to education and freedom of thought and speech. In troubled areas the UN sends in peace keeping troops to stop the fighting. People flock to cities, causing these areas to have high population densities. Slums develop in some areas because city governments don’t have enough money to provide services for everyone so the poorest set up shacks to live in.