The sun: a form of energy available everywhere
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Solar energy, without which there would be no life on Earth, is emitted by the sun in the form of radiation. Although solar energy is stronger on the equator than it is at the North or South Pole, it is available everywhere... but only during the day.
We currently use 3 main techniques and technologies based on solar energy:
- by building in such a way that a structure is facing in the right direction, and has sufficient dimensions to be able to capture the sun's energy
- solar heat panels maximise the capability of the sun's radiation to heat whatever it touches. These panels simply heat air or water that can then be used in homes.
- photovoltaic solar panels convert the sun's radiation into electricity. Technical innovations have already greatly reduced the energy costs required to manufacture these panels - and will continue to do so in the future.
