1. Megacities
AP HUG

2. What are Megacities?
Megacities are large metropolitan areas of 10 million inhabitants or more.
By 2050, 7 out of 10 people will live in megacities

3. Megacities

5. Megacity Demographics
Cities are growing at a rate of around 1 million people every week.
Half the Earth's population will soon live in congested, urban regions mainly in the poor, developing countries of the South.
If the 20th century was the century of urban sprawl, the 21st century will be the century of the megacity.

6. Growth of Megacities in Rich and Poor Countries
While the greatest megacities were once in rich countries, they are now dominated by cities in the less developed world
Why??? Think about rural push factors and natural increase… MAJOR UNIT CONCEPTS!

7. Megacity Demographics
The world's megacities take up just 2% of the Earth's land surface, yet they account for roughly 75% of industrial wood use, 60% of human water use, and nearly 80% of all human produced carbon emissions.
These figures suggest that the struggle to achieve an environmentally sustainable economy for the 21st century will be won or lost in the world's urban areas.

8. Shanghai

9. Agglomerations
An agglomeration is the metropolitan area incorporating several large towns and cities.

11. Urban Hierarchy
A national arrangement of urban areas, for example from one large city to many small villages.

12. BBC Sustaining the City Active Viewing

13. As you watch the film, create a T-Chart in your notebooks, documenting the Opportunities and Challenges found in megacities, given specific evidence of various cities.
Opportunities
Challenges

14. The Opportunities of a Megacity
Megacities are vibrant centers of economic activity, social interaction and creativity.
Hubs in the global network of economic activities such as trade.
Megacities bring together people and resources and are able to generate huge amounts of wealth.

15. Challenges of Megacities
High population concentration and density
Uncontrolled spatial expansion
Severe infrastructural deficits
Inadequate water supply and sewage
Signs of ecological strain and overload
Poor housing provision
Increasing disparity between rich and poor