ABOUT MEGACITIES find the 10 letter mystery word that designates a former industrial area now used for building development or green areas

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Across
  1. 3. an area that is in the outskirt of big cities
  2. 5. it is a portemanteau that is used to name pollution caused in the air we breathe
  3. 8. settle new rules to respect
  4. 9. are the infrastructures available for the urban dwellers
  5. 12. there are way too many people in there
  6. 13. another word for township (SA) or favela (Rio)
Down
  1. 1. the situation is not getting better!
  2. 2. cars cannot go in that part of the town it is a pedestrian....
  3. 4. when more well-off people settle in popular, low income districts
  4. 6. when you mix colours, people from a different social background, various cityscapes
  5. 7. not all megacities in the southern part of the globeare equipped with this infrastructure which causes sanitary issues
  6. 10. with urban sprawl it is difficult to delineate the urban growth ...
  7. 11. the journey city dwellers daily do to get to work and return