Cities

5. Taking on paid work
7. A situation where demand exceeds available resources
9. migration, Movement of people from rural areas to urban areas such as towns and cities
10. Shelter for a person or a group of people. A basic shelter will include services such as clean water, electricity and sanitation
11. A defined urban area within a country
12. modes, Ways in which people and goods move from one location to another
14. size, Total number of people living in an area of land
15. Events that have negative impact on people, the physical and built environments and the economy
16. Facilities which enable people to live comfortably
18. innovation, Use of scientific knowledge to create new products or services
19. Human actions or inaction
20. Types of activities found in a city

1. of life, Well-being of a person
2. factor, A reason that attracts migrants to a destination
3. Learning knowledge and skills
4. Activities to produce goods for sale
5. footprints, The effect that a city has on the environment, such as the amount of natural resources used or the amount of waste produced
6. density, A measurement of the number of people living in a unit area
8. pollution, Release of contaminants that negatively affects the physical environment and human health
13. A system of buildings and equipment to provide water, electricity, telecommunications and transport for a city's residents
14. factor, A reason why migrants leave their place of origin
17. Strategies to regulate natural resource use and minimise negative human impact on the physical environment