How Civilized Are We?

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Across
  1. 2. steal
  2. 3. chase after
  3. 5. harm
  4. 6. areas around
  5. 9. better than others
  6. 10. to make
  7. 12. behave in a gentle and proper manner
  8. 13. kill
  9. 14. throw garbage
Down
  1. 1. make dirty
  2. 3. living together in peace
  3. 4. large area
  4. 7. impolite
  5. 8. to live
  6. 11. ruin or finish completely
  7. 12. hurtful