Suzie Flores left a Manhattan career to farm sugar kelp off the Connecticut coast. Now she's trying to convince the US that the future of sustainable food is growing under the waves. On a February morning, when most of coastal New England is braced against the cold, Suzie Flores is frequently out on the water. The sea has to be calm enough, ice cleared from the boat, GPS buoys still where she left them. If the conditions line up, she will head out from the marina in Stonington, Connecticut -