Here comes the sun
With all these so-called renewable energies, solar, wind, biomass, you may be tempted to ask 'which is the fairest of them all?'. Well, first get some definitions sorted out, because most of them are solar energy, when you think about it. Solar energy is known principally for three aspects: passive use, such as in ventilated cooling or drying systems thermal use, in warming up water, to be heated further by other fuels photovoltaic cell collectors, which convert the sun s light rays into electricity, for direct use, or for storage in batteries. Solar energy lies behind winds, causing winds to rise and fall. It is also in plants, which use the sun s light to photosynthesise, and are later burnt or decomposed to produce gas. Not that the sun is behind all renewable energies. As well as hydroelectric power from water turbines, and geothermal energy from warmth in the earth, there is tidal and wave power, which is generated by turbines placed in the water. Which is where the moon plays a role, as the pulling force behind tides
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| Format: | News Item biblioteca |
| Language: | English |
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Technical Centre for Agricultural and Rural Cooperation
2002
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| Online Access: | https://hdl.handle.net/10568/47603 https://hdl.handle.net/10568/99603 |
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