Environment
Across
- 3. in the correct proportions
- 6. chemical substances for washing things
- 11. result of a drought
- 15. dangerous gaz
- 17. action of clearing a wide area of trees
- 18. disposed
- 20. make a difference to
- 21. made impure
Down
- 1. damage caused to soil, water, air...
- 2. ruined
- 3. capable of being decomposed
- 4. chemical element of atomic number 6
- 5. variety of plant and animal
- 6. to reduce
- 7. power from something
- 8. production and discharge of something
- 9. weather conditions
- 10. biological community
- 12. ceased to exist
- 13. unwanted matter or material
- 14. a large amount of water covering an area
- 16. close to extinction
- 19. no longer in existence