Science

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Across
  1. 3. natural fuel such as coal or gas
  2. 5. use more than once
  3. 6. The action of using resource
  4. 8. Consuming as little energy as possible
  5. 9. Reusing waste material
  6. 10. energy obtained from the heat of the sun
  7. 11. Material that is no longer in use
Down
  1. 1. energy derived from the power of water
  2. 2. electrical energy obtained from the wind
  3. 4. Community of living organism
  4. 6. measures the amount of carbon dioxide is produced by your activity
  5. 7. day marks the date when humanity has used nature's budget for that year