Across
- 2. a kind of city which contain green spaces
- 3. a situation on the road which make vehicles slow or even stop for some time
- 4. a kind of city that use modern technology to operate
- 6. the study and knowledge of the practical use of scientific discoveries
- 7. a person who live in the city
Down
- 1. cameras and smart sensors are kinds of it
- 5. a kind of garden that is on the roof of a building