Across
- 6. the heating
- 7. to exhaust
- 12. renewable
- 13. the consumption
- 14. powerstation
- 15. hydro electric power
- 18. solar
Down
- 1. biodegradable
- 2. to switch off
- 3. to be sufficient
- 4. tidal
- 5. insulation
- 6. resources
- 8. windmill
- 9. to switch on
- 10. gas
- 11. geothermal
- 13. carbon
- 16. petrol
- 17. heating fuel
- 19. dam