Alternative energy
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Alternative energy (also referred to as renewable energy) refers to an energy source that is naturally replenished, such as wind, sunlight, rain, tides, and geothermal heat. The generation of electricity by means of alternative energy sources is generally more expensive than traditional, coal-powered generators.[1][2]
There is debate whether to classify hydroelectric dams as renewable.
References
- ↑ Portsmouth Sustainable Energy Cost Analysis
- ↑ New York Times Online: Cost Works Against Alternative Energy, March 2009.