Across
- 1. electrical energy obtained from harnessing the wind with windmills or wind turbines.
- 5. a liquid mixture of hydrocarbons which is present in suitable rock strata and can be extracted and refined to produce fuels including petrol, paraffin, and diesel oil; oil.
- 6. energy from a source that is not depleted when used, such as wind or solar power.
- 8. relating to or produced by the internal heat of the earth.
- 10. a combustible black or dark brown rock consisting chiefly of carbonized plant matter, found mainly in underground seams and used as fuel.
- 11. a machine for producing continuous power in which a wheel or rotor, is made to revolve by a fast-moving flow of water, steam, gas, air, or other fluid.
- 12. renewable energy produced by living organisms.
- 13. stock or supply
Down
- 2. not able to be renewed.
- 3. radiant energy emitted by the sun.
- 4. the energy released during nuclear fission or fusion, especially when used to generate electricity.
- 7. the supply of electric current to a building for heating, lighting, or powering appliances.
- 9. energy that harnesses the power of water in motion