Solar power is the technology of obtaining usable energy from the light of the Sun. Solar energy has been used in many traditional technologies for centuries and has come into widespread use where other power supplies are absent, such as in remote locations and in space. Solar energy is currently used in a number of applications: Heat (hot water, building heat, cooking); Electricity generation (photovoltaics, heat engines); Desalination of seawater. Its application is spreading as the environmental costs and limited supply of other power sources such as fossil fuels are realized.

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