Across
- 5. radiator
- 8. development
- 9. to cause
- 10. greenhouse gas
- 12. climate change
- 13. to separate
- 14. rubbish
- 16. means of transport
- 17. traffic
- 18. the heating up
- 20. natural disasters
Down
- 1. public
- 2. to save
- 3. environment
- 4. harmful
- 6. earth
- 7. dangerous
- 11. electricity
- 15. pollution
- 16. the change
- 19. to turn off