Across
- 4. A naturally occurring hydrocarbon gas mixture consisting of methane.
- 9. A use of nuclear reactions to produce electricity.
- 10. The use of wind turbines
- 11. A plant or animal material used as fuel to produce electricity or heat.
- 12. A natural fuel such as coal or gas.
Down
- 1. A source of energy that is not depleted by use such as water, wind, or solar power.
- 2. A liquid mixture of hydrocarbons that is present in certain rock.
- 3. A natural resource that can't be readily replaced by natural means at a pace quick enough with consumption.
- 5. Energy Electric power generated from geothermal energy.
- 6. A black or brownish sedimentary rock.
- 7. The use of falling or fast running water to produce electricity.
- 8. generate electricity.