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Across
  1. 3. fuels trains
  2. 6. not using more than you need
  3. 8. water
  4. 9. absorbs sun rays to make energy
  5. 10. can be easily replaced
Down
  1. 1. earth heat
  2. 2. sun
  3. 4. blow
  4. 5. powers your computer
  5. 7. can´t be easily replaced