Across
- 3. the wearing away of rock, stones, and soil by rivers, waves, wind, or glaciers
- 6. it is a soil that has a poor quality
- 8. electricity generated from the sunlight using solar cells
- 10. a lack of fresh water
- 11. harmful rain that produces toxic acid
- 12. coal oil natural gas
- 13. the compression of sediments in bodies of water over long periods of time that form sedimentary rocks
- 16. a resources that will run off
- 18. regions that don't get much rain
- 19. where fertile land becomes like a dessert, usually through misuse
- 20. a drastic change of the temperature
Down
- 1. where sea water is turned into fresh water which people can drink by removing its salt
- 2. a water falling from the sky
- 4. a resource that nature will always provide
- 5. when there is no enough water for everyone's need
- 7. naturally occurring water that's salty
- 9. water that collects below ground, when rain tickles down through the soil
- 14. an upper layer of the earth where plants grow
- 15. electricity generated when flowing water spins a turbine
- 17. a substance added to soil to make more fertile