Across
- 1. base of weathered parent material
- 4. water found in freshwater
- 6. productive land becomes desert
- 9. a resource that can be mined
- 10. pollutants in the air that are harmful
- 11. formed during the process of grinding parent rock.
- 13. a layer of crushed sand
- 14. a resource that exists in fixed amounts
- 15. the replacement of renewable resources
Down
- 2. removing salt from ocean water
- 3. rocks deposited far from their origin
- 5. indoor air pollution
- 7. resources that the earth provides
- 8. substances that can adversely affect organisms
- 12. can be used forever