Wind turbines pay back the carbon cost of their manufacture in about 6 months and last for 20 years or more. After that first 6 months every kilowatt they generate is carbon-free and nuclear waste-free and a gain for our grand-children.
That is not to say that it is not preferable to site them out at sea rather than in areas of outstanding natural beauty; but one also should not be misled by nimbys with their arguments about lack of efficiency, and the fickleness of the wind. These are not relevant to the matter in hand, the saving of the planet.
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