Across
- 6. deposit
- 7. waves
- 8. windmill
- 12. solar panel
- 15. dam
- 17. tidal
- 18. petrol
- 20. heating
Down
- 1. to exhaust
- 2. to switch off
- 3. renewable
- 4. coal
- 5. hydro-electric power
- 9. short term
- 10. heating fuel
- 11. to be sufficient
- 13. wind power
- 14. North Sea
- 16. fall-out
- 19. to stock