North american cities

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Across
  1. 4. apartment houses
  2. 7. smog
  3. 9. a building
  4. 12. downtown
  5. 13. transition zone
  6. 15. right angle
  7. 16. Armenviertel
  8. 17. Geschäftsviertel
  9. 19. a large building
  10. 20. Highway
Down
  1. 1. avenue/street
  2. 2. urban sprawl
  3. 3. when a city is spreading
  4. 5. wohnverhältniss
  5. 6. Residential area
  6. 8. urban sprawl
  7. 10. suburbs
  8. 11. somewhere people live
  9. 14. cars go on this
  10. 18. just outside the city