Alternative energy

3. resource/resources that are sustainable because their formations don't takes billions of years.
7. resource/resources that are not sustainable because their formation takes billions of years.
11. a recyclable materials into something else
12. power/electric or motive power generated by a nuclear reactor.
13. turbine/ a turbine having a large vaned wheel rotated by the wind to generate electricity.
15. rays/waves emitted by the sun
16. source pollution/pollutants that have no specific origin
17. fuel/a natural fuel such as coal or gas, formed in the geological past from the remains of living organisms and take billions of years to replenish
18. panels/a panel designed to absorb the sun's rays as a source of energy for generating electricity or heating.
20. gas/ flammable gas occurring naturally underground and used as fuel.

1. warming/a gradual increase in the overall temperature of the earth's atmosphere generally attributed to the greenhouse effect caused by increased levels of carbon dioxide
2. power/the harvesting of the earths underground heat for power.
4. protection, or restoration of the natural environment, natural ecosystems, vegetation, and wildlife
5. power/ the production of electrical power through the use of the gravitational force of falling or flowing water.
6. resources/materials or substances such as minerals, forests, water, and fertile land that occur in nature
8. gases/a gas that contributes to the greenhouse effect by absorbing infrared radiation
9. power/ a form of hydropower that converts the energy of tides into useful forms of power
10. power/power obtained by harnessing the energy of the wind.
14. source pollution/pollutants that have an identifiable origin
19. power/power obtained by harnessing the energy of the sun's rays.