Across
- 2. the supply of energy that is in line with economic developments and environmental needs
- 3. an alcohol produced from plant matter such a sugar cane or maize which can be used as an alternative to petrol
- 7. a natural fuel such as coal, oil, or gas, formed in the
- 8. past from the remains of living organisms
- 9. form of energy produced by the tides or waves
- 11. form of energy that converts sunlight into electrical energy either
- 12. such as wind or solar energy. also known as an infinite resource or alternative energy
- 15. the reliable availability of energy sources at an affordable price with a consideration of the environmental impact.
- 16. photovoltaic (PV) panels or through mirrors that concentrate sunlight solar radiation.
- 17. from the formation of radioactive decay of material inside the earth. These underground reservoirs of steam and hot water can be tapped to generate electricity.
- 20. any natural resource that can replenish itself naturally over
- 21. of free-falling water to electricity
Down
- 1. resources that will run out and not be replenished by natural means on a level equal to consumption. also known as a finite resource. Example: oil, natural gas and coal
- 4. energy by the use of wind turbines to generate electricity.
- 5. fissures and extract oil or gas
- 6. a gas such as methane that can be used as a fuel and is produced by fermenting organic matter.
- 10. the energy released by nuclear reactions in the nucleus of atoms such as uranium or plutonium
- 11. rocks, boreholes, etc. so as to force open
- 13. systems that react promptly to sudden changes in supply-demand balance
- 14. HydroElectric Power; a form of energy generated by the
- 18. the process of injecting liquid at high pressure into
- 19. heat energy from the earth- geo (earth) + thermal (heat) which