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