1. How land is used in cities – URBAN FORM
2. A situation in which resources are being used up at a faster rate than they can be replaced – UNSUSTAINABLE DEVELOPMENT
3. A situation in which more people live in an area than the area can provide services for – OVER-URBANIZATION
4. The increase in the population of a city – URBANIZATION
5. An area's ability to meet its needs without reducing its ability to meet its future needs – SUSTAINABLE DEVELOPMENT