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From left, summer youth workers Hope Bedeau and Alex Tindell check the thermometers of two solar heaters they designed and built along with 18 other youth workers at Camp Rabideau, a Civilian Conservation Corps camp built in the 1930s located six miles south of Blackduck. The solar furnaces will be used to heat the greenhouse onsite in the cooler months to extend the growing season. Pioneer Photo/Anne Williams

Area students design and build solar heaters to warm greenhouse

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What do you get when you combine wood, window glass, a space blanket, aluminum cans, black paint and a 25-foot dryer duct?

A homemade solar furnace, of course.

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