tic tac toe 2/23

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Across
  1. 2. street
  2. 6. threat
  3. 9. pollution
  4. 11. population
  5. 13. success
  6. 14. city
Down
  1. 1. pollution/contamination
  2. 3. car
  3. 4. tobreathe
  4. 5. environment
  5. 7. danger
  6. 8. quality
  7. 10. worse
  8. 12. health