Across
- 4. able to be kept at a certain level
- 6. traffic jam
- 8. sprawl the unplanned and uncontrolled spreading of cities into surrounding regions
- 9. the basic physical and organisational structures and facilities (e.g., buildings, roads, and power supplies)
Down
- 1. the contamination of air by harmful substances including gases and smoke
- 2. Migration into cities from rural areas.
- 3. The increase of people living in towns and cities
- 4. air pollution by a mixture of smoke and fog
- 5. the population getting larger because of births and deaths
- 7. a person who travels from home to work and back