Wind power
Wind energy is the one possessed by the wind. Wind is the flow of gases on a large scale. It consists of the movement of air caused by the differential heating on large areas of the earth surface by the sun.
Example of a SMEA wind turbine blade
Since ancient times, men have learnt to exploit this power, using it, for example, to grind wheat or draw water from wells by windmills Today wind energy is mainly used to produce electricity, through wind turbine generators, which are actually the technological evolution of windmills.
Wind plant, together with hydroelectric ones, are the only one that can replace significan amounts of fossil fuel based plants, thus contributing to reduce emissions of greenhouse gases.
