Across
- 2. is more efficient than energy.
- 4. use wood to heat houses
- 9. is fine and good in biomass
- 11. is not a noisy energy source
- 13. is dangerous for transportation
- 14. is a light weight energy source
- 15. is a renewable source.
- 16. energy source is free
- 18. generates the most electricity from geothermal energy.
- 20. is renewable as long sun is shining
- 22. has 26% in industry
Down
- 1. needs drilling sometimes from the earth to get energy
- 3. is bad for solar energy source
- 5. turbines harm animals
- 6. is a way to save energy
- 7. are large land for windfarms.
- 8. fuels energy source makes fuel cells
- 10. and alcohol mixed is gashol
- 12. is mainly used for exporting
- 17. resources are harmed in hydropower source
- 19. is the percentage of coal mined in United States is exported
- 21. the process of hydrogen atoms combining to form helium atoms