Geo thingy

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Across
  1. 3. attract people to cities
  2. 4. areas mainly consisting of spacious houses
  3. 5. the center of a city with tall modern high rise buildings
  4. 7. people move out of urban ares to rural areas
  5. 8. the increase in population of urban settlements
  6. 9. a city with a population of 10 million or more
  7. 12. jobs attract more people which create more jobs and so on
  8. 15. type of transport like BTS/MRT, bus, train
Down
  1. 1. The concentration of people and economic activities at favorable locations
  2. 2. People move from near the city center, outward
  3. 6. Area with factories and large complexes and newly built roads
  4. 10. have dense old residential buildings
  5. 11. force people to leave rural areas
  6. 13. made of small carbon particles
  7. 14. Traveling between one’s home and place of work on a regular basis