Across
- 3. Energy source formed from ancient organisms
- 8. Materials pumped underground during fracking
- 9. Total amount of gas available worldwide
- 10. ranges from about 5 to 28
Down
- 1. Fossil fuel used for heating, cooking, and electricity
- 2. First and most common drilling method
- 4. High pressure process that cracks rock to release gas
- 5. Main historical use of natural gas in the 1800s
- 6. Holds the largest Natural Gas reserves
- 7. Main greenhouse gas that leaks during natural gas transport