Rio Keywords

3. When more babies are born than people who die, so the population increases.
4. The increase in the percentage / proportion of people living in urban areas (towns and cities).
6. Unclean air caused by traffic congestion.
10. People work without paying taxes, which can be dangerous and without regular pay.
12. The increase in the area of a country or world covered by cities
14. the standard of health, comfort, and happiness experienced by an individual or group.
16. Reasons why people are attracted to the city
17. The movement of people from the countryside to a built up area (town or city).

1. The planning of the physical and social development of a city.
2. Unclean water due to sewage or industrial pollution.
5. Measures designed to protect public health
7. Government gives people the materials to improve their homes. People are trained how to build.
8. A built up, densely populated area, e.g. a town or city.
9. Cities with a population over 10 Million
11. Reaseons why people want to leave the countryside
13. Informal settlement in Brazil
15. A more sparsely populated area where countryside dominates.