Rick Hander, plant manager of Milk Specialties in Mountain Lake, Minnesota, watches some of the company's 48 filtration pumps that run around the clock. The company processes whey into a high protein distillate for sports nutrition and weight loss supplements and is Mountain Lake's largest energy consumer. Mountain Lake uses power partly produced by a wind turbine installed by Juhl Wind. (Glen Stubbe/Minneapolis Star Tribune/MCT)
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