Across
- 3. one specific site of pollution
- 6. heating of natural water that results in human activity
- 7. water under earth's surface;can be liquid or frozen
- 8. increase in the amount of nutrients in water
- 11. overuse of groundwater causes sea water to seep in aquifers,contaminating water supplies
- 13. a body of water that usually forms behind a dam
- 14. removing harmful bacteria and microbes from water
- 15. when live or dead organisms are added to water supplies
- 16. growth of cities and towns due to people moving into urban areas
Down
- 1. when harmful chemicals are added to water supplies
- 2. many small sources of pollution
- 4. water that is suitable to drink
- 5. a body of rock or sediment that can store a lot of water
- 9. materiel that makes water harmful
- 10. frozen layer of soil in polar regions
- 12. water above ground