1. Megacities

2. What Are They? Cities with a population over 10m.
Megacities grow due because of economic growth, rural-urban migration and high rates of natural increase.
As cities grow the swallow up rural areas and other towns and cities nearest.
They become multi-nuclei centres with due to engulfing neighbouring urban areas and their CBD’s.
Some of these cities are larger than the populations of entire countries.

4. Impacts Environment. Pollution. Increased Resource Depletion.
Migration (Both in and out).
Tourism.

5. Activity
Watch Megacities: Mexico City and create a case study under the following points...
Past.
Present.
Future.