Food & agriculture · 2012

Vertical farming

Stacked, LED-lit hydroponic racks grow greens indoors in cities, year-round.

Sky Greens in Singapore opened one of the first commercial vertical farms in 2012. Such farms can use up to 95 percent less water per kilogram of leafy greens, though high electricity costs have sunk several large operators.

See it in the living treeWikipedia