(CNN) — Less than 20 miles from Singapore’s skyscrapers is a completely different set of high-rise towers.
Much smaller in scale but with a big ambition, over 100 nine-meter tall towers at Sky Greens vertical farm offer a new vision of urban sustainability.
Green vegetables like bak choi and Chinese cabbage are grown, stacked in greenhouses, and sold at local supermarkets.
The idea of vertical farming goes back to the 1950s, but Jack Ng, farm owner and inventor of the system in place at Sky Greens, has patented elements of his design.
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