Across
- 4. In 1816 this city used gas lamps
- 6. In this city
- 8. In 1821, he dug the first NG well
- 10. The Main Ingredient in Natural Gas
- 11. This and the Heat of the Earth created petroleum
- 12. most eco-friendly fossil fuel
- 14. uses water, silica (sand), and chemical compounds
- 15. P___ is found in NG
Down
- 1. produces 1/5 of the world's NG
- 2. NG is found in ____ rocks
- 3. Tiny Sea animals and plants covered by this
- 5. B___ is found in NG
- 7. Natural gas ___ average 8,600 feet deep
- 9. The chemical odorant added to NG
- 13. This is found in landfills and is used to power them