Across
- 3. A special path reserved for bicycles
- 6. Devices that turn sunlight into electricity
- 7. Turning waste into new usable materials
- 8. Growing food on top of buildings
- 9. A gas that traps heat in the Earth’s atmosphere
Down
- 1. Energy that never runs out (sun, wind, water)
- 2. A person who walks, especially in a city
- 4. An area with grass, trees, and nature in a city
- 5. Buses, trains, or metros shared by everyone