Urbanisation

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Across
  1. 3. A county that is famous for its crime and poverty
  2. 4. A lot of this is thrown into the environment
  3. 8. One of the major issues for cities
  4. 9. Cities produce a lot of this
  5. 12. Some cities put these on roofs to make electricity
  6. 14. Trains that move at ultra-high speed
  7. 19. Making things last into the future
  8. 20. A kind of pollution seen at night
  9. 22. Issues of safety for cities
  10. 23. A megacity that is built across islands
  11. 24. A city famous for its underground transportation system
Down
  1. 1. Some cities are doing this to get local honey
  2. 2. Where a lot of rubbish goes, but isn't sustainable
  3. 5. A large number of these are built over waterways
  4. 6. A limit of this forces cities to grow upwards
  5. 7. Long vehicles that can carry a lot of people
  6. 10. Contamination can affect food when these are long
  7. 11. A city that is clogged with motor cars
  8. 13. Moving people around cities
  9. 15. Where most people will live by 2075
  10. 16. Japan's megacity with many people living there
  11. 17. A personal transporter with two wheels
  12. 18. A kind of pollution involving sound
  13. 21. A county famous for its wealth and high-rise buildings