Across
- 3. - water held underground in soil.
- 5. - an area of land that separates water flowing to all bodies of water.
- 7. - the process of settling as a sediment.
- 9. - a shaft in the ground to obtain water.
- 10. - being a source of pollution.
- 11. - a substance that pollutes something.
- 12. - introducing harmful things to the environment.
- 13. - water collected on the surface.
Down
- 1. - a body of rock which can obtain or transmit groundwater.
- 2. - a single identifiable source of air, water, noise or light.
- 4. - safe drinking water
- 6. - generated from rain and snowmelt that flows over land surfaces.
- 8. - the preservation, control and development of water resources.