Conservation Cross word Puzzle

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Across
  1. 2. Use something again instead of throwing it away
  2. 4. Harmful substances in the environment
  3. 7. Keep something in good condition
  4. 9. Save and use wisely
  5. 10. Trash left lying around carelessly
  6. 11. Careful use of resources
Down
  1. 1. Turn waste into new materials
  2. 3. The natural world around us
  3. 4. Keep something safe from harm
  4. 5. Unwanted or unusable materials
  5. 6. The process of rotting
  6. 8. Use less of something to save resources