Minnesota Public Radio slideshow:
Wind power is another cash crop
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A welder inside a wind tower being built at SMI & Hydraulics in Porter, Minnesota. The steel towers are more than 200 feet tall. (MPR Photo/Mark Steil)

A welder inside a wind tower being built at SMI & Hydraulics in Porter, Minnesota. The steel towers are more than 200 feet tall.

(MPR Photo/Mark Steil)
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