M’zaka zaposachedwapa, mphamvu yamagetsi padziko lonse yakula kwambiri.Kufunika mphamvu zongowonjezwdwa n'kofunika kwambiri kuposa kale.Mphamvu yamphepo, yomwe imadziwika kuti ndi imodzi mwazinthu zopatsa mphamvu zongowonjezereka, yakula kwambiri m'zaka zaposachedwa.Majenereta amphepo, kapena ma turbines amphepo, awonetsa kuthekera ...
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