Across
- 2. danger
- 3. effect
- 4. by a small amount
- 6. make a big change
- 8. poisons to kill bugs
- 10. changed
- 11. enough
- 12. chickens, ducks, geese etc
- 15. burp
- 16. doesn't eat meat
- 18. animal poo
- 19. farm animals
- 20. give off
Down
- 1. animals eating grass
- 4. not enough food
- 5. plant food
- 7. can continue with no environmental impact
- 9. eat
- 10. a greenhouse gas
- 13. in the open
- 14. huge
- 17. not important