In this photo taken on May 20, 2014, agricultural teacher David Friend waters impatiens starter plants that his plant science class just planted inside the new greenhouse, which is part of the new Agriculture Research Facility at Kiel High School in Kiel, Wis. Several Wisconsin high schools are building greenhouses to help teach students about aquaponics and sustainable agriculture. (AP Photo/Herald-Times Reporter, Sue Pischke) NO SALES
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