Across
- 3. fuel from dead animals
- 5. extracting minerals from the Earth
- 7. highly abundant used in heating most homes
- 9. used in transportation around globe; relatively cheap fuel
- 11. geological energy
- 12. replenishes itself faster than it can be used
Down
- 1. water energy
- 2. used faster than it can be replenished
- 4. energy from the uneven heating of the Earth
- 6. very small amount of resources for a large amount of energy
- 8. used in most residential and commercial buildings
- 10. energy from the sun