Across
- 2. to pollute
- 7. ozone layer
- 9. organic waste
- 10. solar panel
- 13. to dispose of (waste, refuse, sewage)
- 17. coal
- 18. source of energy
- 19. wind turbine
- 23. pollution, contamination
- 24. to protect
- 25. nuclear energy
- 26. exhaust fumes
- 27. hydroelectric power station
- 28. environment
Down
- 1. to save (money)
- 3. environmentally friendly
- 4. damaging, harmful
- 5. clean, neat
- 6. solar energy
- 8. pollution
- 11. clean, refine
- 12. to heat up
- 14. heating
- 15. dirty
- 16. nuclear power plant
- 17. power station
- 20. to save (thing)
- 21. wind power
- 22. hole in the ozone
- 24. to damage
- 26. nuclear power