| A | B |
|---|
| renewable energy | a source of energy that is not used up, e.g. solar energy |
| biomass | animal or plant material that is used to produce energy |
| hydroelectric energy | the production of electrical power through the use of the gravitational force of falling or flowing water |
| wind energy | the use of wind or wind turbines to generate electricity; energy produced by air movements |
| tidal power | the use of tides or waves to generate electricity |
| geothermal energy | the use of heat from the earth to heat water or produce steam to turn turbines that produce electricity |
| solar energy | energy from the sun |
