Photo taken on Aug. 23, 2018 shows plants growing at OKO Farm in Brooklyn, New York, the United States. As the only outdoor aquaponics farm in Brooklyn, OKO farm is open for educational tour, farm-to-table workshop, and training program. Its aquaponics technology combines conventional aquaculture with hydroponics, by using waste water from a fish tank as fertilizer to grow plants. (Xinhua/Lin Bilin)