Across
- 2. windmill
- 3. flood
- 5. carbon footprint
- 8. fuel
- 9. waste
- 10. a battery
- 12. solar panel
- 13. endangered species
- 17. greenhouse gasses
- 18. electrical output/efficiency
- 21. packaging
- 22. sustainable development
Down
- 1. fuel
- 4. disposable
- 6. energy savings
- 7. drought
- 11. sustainability
- 14. to sort
- 15. wind power
- 16. solar panel
- 19. oil spill
- 20. fumes