The heating of the earth is uneven due to daily rotations of our planet and creates winds. The energy of wind can be captured by turbines and converted into electricity. This is the least expensive, and fastest growing, renewable energy technology. Solar energy that is stored in green plants and other organic matter is referred to as biomass. Geothermal power plants, which like biomass facilities resemble conventional power plants, utilize steam that lies below the surface of the earth in certain locations to generate electricity.
Geothermal plants emit little air pollution and can have minimal impacts on the environment.
The kinetic energy of flowing water is the oldest and most readily available form of renewable energy. Large hydroelectric plants, however, can also carry a big environmental price tag, such as loss of endangered fish species. The cleanest form of energy is the energy we save through efficiency and conservation. The Green- e Program recognizes verifiable conservation measures as contributing to a cleaner energy resource mix. This electricity grid of wires, transformers, substations and other infrastructure provides a large pool of electrical energy.