Across
- 3. frozen layer of soil in polar regions.
- 6. body of water above the ground
- 7. growth oftowns a cites due to people moving from rural areas to urban area.
- 9. when harmful chemicals are added to water supplies
- 11. occurs when live or dead or dead organisms are added to water supplies
- 16. one specific site site of pollution
Down
- 1. many sources of pollution
- 2. an increase in the amount of nutrients in water
- 4. overuse of groundwater causes seawater to seep in aquifer, contaminating water supplies
- 5. any heating of natural water that results from human activity
- 8. when waste or other material causes water to become harmful to organisms
- 10. removing harmful bacteria and microbes from water
- 12. a body of rock or sediment that can store a lot of water
- 13. a body of water that usually forms behind a dam
- 14. water under earths surface in spaces in rocks and soil
- 15. water that is suitable to drink