City of the future

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Across
  1. 3. Using technology to help people
  2. 6. Things we use like water, energy or materials
  3. 7. Power used for homes and transport
  4. 8. Dirty air or water
Down
  1. 1. Ways to move in the city
  2. 2. With nature, trees and plants
  3. 3. Very tall building
  4. 4. Machines and new tools
  5. 5. Using things again