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In search of greener turbines

As an electrical design engineer with an interest in wind turbines, I was wondering if anybody could explain to me (and maybe other readers) why exactly all wind turbines seem to be painted white?

In many of your magazine's photographs showing wind turbines and, in particular, wind farms, the general view of the site is with rolling hills in the background which are either covered in heather or grass. Why then do the turbines have to be white and stand out visually against a brown or green background? Why not paint them green? I could understand the need for white towers at sea where the object is to make them stand out against the water, but why also paint them white when located inland? Surely the idea is to reduce the visual impact, is it not?

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