Across
- 2. suitable to drink
- 4. growth of towns and cities due to people moving
- 5. material deposited in water that contaminated
- 6. many different sites of pollution
- 9. added chemicals to water that contaminate it
- 10. removing bacteria from contaminated water
- 12. a body of water formed behind a dam
- 13. an increase of nutrients in water
- 14. a body of rock or sediment that can hold a lot of water
- 15. a layer of soil that is frozen
Down
- 1. water under earth's surface
- 2. one specific site of pollution
- 3. organisms added to water that contaminate it
- 7. overuse of ground water that causes saltwater to seep in
- 8. heating of natural water caused by humans
- 11. body of water above the surface