Grown from necessity: vertical farming takes off in ageing Japan

KYOTO -- The nondescript building on an industrial site near Kyoto gives little hint to the productivity inside: 30,000 heads of lettuce grow here daily, under artificial light and with barely any human intervention. This "vegetable factory", using the latest vertical farming techniques, is part of a trend born out of necessity in Japan, where traditional farming faces a double threat from the ageing population and migration towards the cities. With the average age of a farmer in Japan at 67 and few candidates to replace those dying out, the country has been forced to become a pioneer in so-called vertical farming. Globally renowned firms such as Panasonic, Toshiba and Fujit...

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