Giant 'vertical' farm opens in Denmark | AFP

A purple glow illuminates stacked boxes where lettuce, herbs and kale will soon be sprouting at one of Europe's biggest "vertical farms" just opened in a warehouse in Copenhagen's industrial zone. Fourteen layers of racks soar from floor to ceiling in this massive, 7,000-square-metre (75,350-square-foot) hangar used by Danish start-up Nordic Harvest.

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[tommyhundersmarck]

One stray little aphid and there is a local lettuce pandemic, trust me, I've tried this at home :P

[CC-jygr]

extremely profitable and low cost once you get past start up. this is the unfortunately the future of food