An abundance of fresh vegetables grow on the first floor of a shopping mall in a downtown residential area.
They're grown using hydroponics, a slightly different method of using water to cultivate plants.
Meanwhile, this urban farm utilizes "aquaponics," a technique that uses excrement from fish raised in the tank next to the vegetables as nutrients.
In this tank, there are around 80 carp and one-thousand koi.
The thank's water that contains the excrement and microorganisms is supplied to the vegetables to act as natural fertilizer.
"The fish excrement in the water helps the vegetables grow, and when the plant roots purify the water, that water is recirculated to the fish tank. This is a 100-percent natural and sustainable farming method."
The vertical arrangement of this small urban smart farm maximizes space.
An ordinary farm would need six times the amount of land to cultivate the amount of vegetables that's grown on six shelves, or six tiers, of an aquaponics farm.
The farm we see now grows nine different vegetables that're ingredients for wraps or salads.
Most are used to make school meals because they're organic and eco-friendly.
"As a response to global warming and extreme weather, we plan to promote urban aquaponics smart-farms so that the stable production of vegetables is guaranteed all year."
Managed by one urban farmer alone, this smart-farm usually sees annual sales of almost 100-million-won, or roughly 78-thousand U.S. dollars.
Along with substantial revenue, the biggest advantage of this aquaponics smart-farm is
that it can make use of the most of limited space in the city while also providing a stable supply of high-quality vegetables.
Jeong Eun-joo, Arirang News.