Solar energy is renewable energy that comes from the Sun irradiance. The irradiance that reaches the Earth has been used for the humankind since the Antiquity through a range of different ever-evolving technologies. At the present moment, both the heat and the light from the Sun are harnessed using captors such as photovoltaic cells, heliostats or thermal collectors, transforming them into electric or thermal energy. Solar energy is one of the so-called renewable or clean energy, which will probably help to solve most of the most urgent facing mankind this day and age.

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