Across
- 5. low humidity
- 9. carbon...
- 12. global...
- 13. high temperature
- 14. the variety of animals
- 16. ice catastrophe
- 17. nuclear...
- 18. fire catastrophe
- 19. species disappearing
Down
- 1. water catastrophe
- 2. object you cannot reuse
- 3. earth catastrophe
- 4. forests disappearing
- 6. climate...
- 7. air...
- 8. wind catastrophe
- 10. people or animals relocating
- 11. energy you can reuse
- 15. frozen layer in the tundra
- 17. defending nature