Smart Cities Crossword

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Across
  1. 2. Dirty air from cars and factories
  2. 6. Spanish city that loves green technology
  3. 8. City with sensors everywhere
  4. 9. Lots of cars moving on the road
  5. 11. Another word for older people like grandparents
Down
  1. 1. When traffic is jammed and moving slowly
  2. 3. To watch or check something carefully
  3. 4. A central place or center
  4. 5. A small device that can 'feel' light or movement
  5. 7. To use materials again to make new things
  6. 10. A program on your phone