Across
- 4. the process by witch water on earth?
- 7. rubbish that is not in it's place
- 10. the thing that is all around us
- 11. place we things live
- 13. to cut a long straight line into or though
- 14. something that pollute
- 15. a chemical that kills insects
- 17. a chemical that kills unwanted plants
Down
- 1. to annoy something
- 2. helps grow plants
- 3. something that can bought or sold
- 5. having to do with the sea
- 6. dirty water that smells
- 8. a waste substance that makes air unhealthy
- 9. a tiny specimen
- 12. water and waste material that is carriad away in sewers
- 16. a solid or liquid base