Agricultural researchers believe that building indoor farms in the middle of cities could help solve the world's hunger problem. Experts say that vertical farming could feed up to 10 billion people and make agriculture independent of the weather and the need for land. There's only one snag: The urban farms need huge amounts of energy.
One day, Choi Kyu Hong might find himself in a vegetable garden on the 65th floor of a skyscraper. But, so far, his dream of picking fresh vegetables some 200 meters (655 feet) up has only been realized in hundreds of architectural designs.
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