Oxford Dictionary - energy fuelled in ways that do not use up natural resources or harm the environment.
Princeton WordNet - energy derived from sources that do not use up natural resources or harm the environment.
Responding to Climate Change 2007 - energy derived from nontraditional sources (e.g., compressed natural gas, solar, hydroelectric, wind).
Natural Resources Defense Council - energy that is not popularly used and is usually environmentally sound, such as solar or wind energy (as opposed to fossil fuels).
Materials Management Services - Fuel sources that are other than those derived from fossil fuels. Typically used interchangeably for renewable energy. Examples A** include: wind, solar, biomass, wave and tidal energy.
Torridge District Council - Energy generated from alternatives to fossil fuel. Need not be renewable.
Reff:
Concise OED Alternative Energy. Accessed May 2, 2008.
WordNet. Alternative Energy entry.
RICC 2007. Term Glossary.
NRDC. Glossary.
MMS. Definitions.
Torridge District Council. TDLP PART 1 - GLOSSARY.
