Natural Resources
Across
- 4. A source of energy made from the remains of ancient, once-living things
- 5. A useful source of energy that is replaced quickly in nature
- 7. Any harmful substance that affects Earth’s land, air, or water
- 8. Something that is found in nature and is valuable to humans
- 9. Energy obtained from Earth’s interior
- 10. Electricity produced by waterpower
Down
- 1. A source of energy other than the burning of fossil fuel
- 2. A natural material or source of energy that is useful to people and cannot be replaced easily
- 3. Type of fuel made from biomass, or living or formerly living material
- 6. Power obtained from solar energy to generate electricity using solar cells