Across
- 4. This is the act of preserving natural resources.
- 5. This is a natural, renewable energy resource produced by Earth's naturally occurring heat, steam, and hot water.
- 7. This means pertaining to land.
- 9. These provide a source of energy and come from the decay of organisms.
- 12. These are resources obtained from the Earth.
Down
- 1. These natural resources are limited.
- 2. This fossil fuel exists in the form of a gas.
- 3. These natural resources can be replenished.
- 6. water power
- 8. This means pertaining to water.
- 10. energy from the sun
- 11. This is the mass of dried living matter.