Energy efficient crossword

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Across
  1. 4. Another word for possible (adj) or possibility (n)
  2. 6. Something we put on the roof to make energy from the sun
  3. 7. Describes natural food with no chemicals
  4. 10. Cutting down trees
  5. 14. Ways to travel around, eg. cars, buses, trains
  6. 15. The gas that comes out of something
  7. 17. Another word for power
Down
  1. 1. We don’t waste things; we use our things in the best way
  2. 2. A suggestion
  3. 3. Power that comes from water
  4. 5. Lots of towers that get power from the wind
  5. 8. To use something again, instead of throwing it away
  6. 9. A lake, made by people to get energy
  7. 11. We put this on food to help it grow
  8. 12. A machine we use for daily life, eg. fridge, oven, hair dryer
  9. 13. Animals we keep on a farm
  10. 16. Where something comes from