Energy

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Across
  1. 4. uses wind. clean energy
  2. 5. uses the sun for energy
  3. 6. energy can be used more than once
  4. 8. energy cannot be used more than once
Down
  1. 1. uses running water for energy
  2. 2. uses waste for energy
  3. 3. heat from inside the earth for energy
  4. 7. efficient energy that uses less power and is less expensive to operate