Saving the Earth

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Across
  1. 1. To keep something safe.
  2. 2. Someone who helps without being paid.
  3. 6. Doing the right thing; taking care of duties.
  4. 7. Someone who does something brave or helps others.
  5. 11. Helping others or doing work for the community.
  6. 13. The reason someone does something.
Down
  1. 1. A leader of a group or country.
  2. 3. A special task or job with a purpose.
  3. 4. Something that needs to be fixed or solved.
  4. 5. Something important or useful.
  5. 8. What people think or believe.
  6. 9. Traditions and beliefs passed down from the past.
  7. 10. What happens at the end; the result.
  8. 12. Something you want to achieve.