In a Thursday, Feb. 8, 2018 photo, Mike Knight, co-founder of Clean Fresh Food near Paoli shows off some of the nearly full-grown lettuce grown in his greenhouse that is part of an aquaponics system located on a former dairy farm Farming can many forms but for Mike Knight, it includes tilapia and growing fresh vegetables year round all without dirt. Knight's aquaponics farm provides fresh vegetables to local grocery stores and restaurants year round. (Steve Apps/Wisconsin State Journal via AP)
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