Across
- 2. A car that uses both gasoline and electricity.
- 4. Solar and wind energy are types of this energy.
- 6. Cars and buses are types of these.
- 10. Gasoline and diesel are types of these.
- 11. This type of pollution is common in big cities.
- 12. Checking air quality in real-time is called this.
- 13. Building new things is called this.
- 14. Factories belong to this group.
Down
- 1. Parks and open spaces are this color.
- 3. Modern inventions that help reduce pollution.
- 5. This type of vehicle uses batteries instead of gasoline.
- 7. Use this kind of transportation to reduce pollution.
- 8. We want the air to be _____.
- 9. These help clean the air from factories.
- 15. Cleaner cities attract more people to travel and visit. This is called _________.