Minnesota Public Radio slideshow:
From windmills to wind farms
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Windmills were used to grind grain in rural areas like his. Koenig says if the wind kicked up, it wasn't unusual to be roused from bed in the middle of the night and sent to work. (MPR Photo/Erin Galbally)

Windmills were used to grind grain in rural areas like his. Koenig says if the wind kicked up, it wasn't unusual to be roused from bed in the middle of the night and sent to work.

(MPR Photo/Erin Galbally)
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