# Mega-cities

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Category: Geography
Slides: 30
Updated: 2026-05-15T22:18:04.441Z
Tags: geography, mega, cities

## Summary

In 1800 perhaps 3% of humanity lived in cities. In 1950 it was 30%. In 2024 it crossed 57%. By 2050, on UN projections, it will be 68%. The 21st century is being built in megacities. Key sections include: MEGA- CITIES.; Opening The urban century.; Chapter I What is a megacity.; Chapter II Tokyo.; Chapter III Delhi.; Chapter IV Shanghai.; Chapter V Mumbai.; Chapter VI Beijing.; Chapter VII Cairo.; Chapter VIII Mexico City..

## Slide Outline

1. MEGA- CITIES.
2. Opening The urban century.
3. Chapter I What is a megacity.
4. Chapter II Tokyo.
5. Chapter III Delhi.
6. Chapter IV Shanghai.
7. Chapter V Mumbai.
8. Chapter VI Beijing.
9. Chapter VII Cairo.
10. Chapter VIII Mexico City.
11. Chapter IX São Paulo.
12. Chapter X Lagos.
13. Chapter XI Informal settlements.
14. Chapter XII Mass transit.
15. Chapter XIII Water and sanitation.
16. Chapter XIV Governance.
17. Chapter XV Air pollution.
18. Chapter XVI Megacities under climate stress.
19. Chapter XVII Rural-to-urban migration.
20. Chapter XVIII The housing question.
21. Chapter XIX Inequality.
22. Chapter XX Smart city / surveillance.
23. Chapter XXI Megacities of the future.
24. Chapter XXII Megacities people don't think enough about.
25. Chapter XXIII Reading list.
26. Chapter XXIV Watch & read.
27. Chapter XXV What works.
28. Chapter XXVI Why this matters.
29. Chapter XXVII The density question.
30. The end of the deck.

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