Many cities, including Milwaukee, have "food deserts," or large areas without traditional grocery stores because poverty is high, and supermarkets choose not to operate there. As a result, residents have less access to affordable fresh fruits and vegetables. Neighborhood corner stores and convenience stores typically don't offer quality fresh produce....Hence, "high potential" for urban farms and aquaponics. I sense high potential for boondoggle-ponics. There aren't enough grocery stores, so you want people in the city to farm? You want the poor to become farm workers... subsistence farmer workers? Is that really a good use of city space and human labor? Who benefits?
By the way, inserting a space in the word "neighborhoods" — see above — creates the wrong impression.