Across
- 4. a body of water that usually forms behind a dam
- 9. Many small soures of pollution
- 10. when harmful chemicals are added to water supplies
- 12. overuse of groundwater causes seawater to seep in aquifers,contaminating water supplies
- 14. Growth of towns and cities due to people moving from rural areas to urban area
- 16. Occurs when live or dead organisms are added to water supplies
Down
- 1. A body of rock or sediment that can store a lot of water
- 2. Removing harmful bacteria and microbes from water
- 3. an increase in the amount of nutrients in water
- 5. any haeting of natural water that results from human activity
- 6. Water under Earth's surface in spaces in rock or soil; can be liquid or frozen
- 7. one specific sit of pollution
- 8. Water that is suitable to drink
- 11. Frozen layer of soil in polar regions
- 13. when waste or other material causes water to become harmful to organisms
- 15. body of water above the ground