Across
- 3. Made under ground over millions of
- 4. Caused by fires
- 8. A huge fire
- 9. Lets people travel long distances
- 11. how to make gas
- 13. Used in lightbulbs
Down
- 1. Protects people
- 2. Makes electricity and pollution
- 5. Alternative to gas but worse
- 6. Made by our sun
- 7. used in cars
- 10. Fuels cars
- 12. Mix of smoke and fog