Hilla energy crossword

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Across
  1. 2. what creates circulation throughout house with solar heat
  2. 6. what do the wind have to be to get enough power
  3. 7. built dams to make what kind of waterfall
  4. 13. what is oil mainly used for
  5. 14. name of something that can be remade in a short time
  6. 17. what comes from the sun and goes through solar panels
  7. 18. what rips the cells apart
  8. 19. what is impossible to power on demand
  9. 22. what is cost and energy efficient
  10. 23. what can be burned for fuel instead of wood and coal
  11. 24. compounds made from oil
  12. 25. what can be reformed
  13. 27. what comes from biomass created by humans
  14. 29. what is one of the 3 major fossil fuels
  15. 30. what is not eco-friendly
Down
  1. 1. How much area does wind take up in one farm
  2. 3. what energy conversions occur when a car engine burns gasoline
  3. 4. what animal is mostly affected by dams
  4. 5. what is coal mainly used for
  5. 8. hydropower is more what than wind and solar
  6. 9. both fuel cells and what convert the chemical reaction to electricity
  7. 10. how much less acid rain comes from geothermal
  8. 11. name of something that can be remade in a long time
  9. 12. what turns when wind hits it
  10. 15. what comes from movement of water
  11. 16. garbage can be burned as what
  12. 20. what is it called when alcohol is added to gasoline
  13. 21. what comes from the sun and goes through these panels
  14. 26. what cell will work if hydrogen is provided
  15. 28. what causes people to relocate