That's an idea!

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Across
  1. 4. - Actions that destruct the environment.
  2. 6. - Make a good use of a resource.
  3. 10. - The process of eliminating rubbish from a place.
  4. 11. - Putting an object into the rubbish and eliminate it.
  5. 12. - Use an object more than once.
Down
  1. 1. - Decrease the amount of an object.
  2. 2. - Make a bad use of a resource.
  3. 3. - Eliminate things you don’t want.
  4. 5. - Exhaust all the resources we have.
  5. 7. - A way to protect the environment by separating rubbish.
  6. 8. - Actions that help the environment.
  7. 9. - Destruct the environment.