Alternative energy is typically defined as coming from sources that do not deplete natural resources or harm . Wind power is a typical example. The term alternative is used to contrast with fossil fuels according to some sources. Renewable energy differs from Alternative energy in that it may have significant environmental impact, as is the case for most hydroelectric dams.
|Oxford Dictionary||energy fuelled in ways that do not use up natural resources or harm the environment.|
|Princeton WordNet||energy derived from sources that .pngdo 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 include: wind, solar, biomass, wave and tidal energy.|