Urban C. Lehner Editor Emeritus
Mon Apr 13, 2015 06:03 AM CDT

No Farms, No Food -- But What's a Farm?

Whoever coined the bumper-sticker slogan "No Farms, No Food" was probably not thinking of Ed Horton's farm.

It's housed inside an office building in Irvine, California, population 243,000. It uses LEDs for light, ground-up coconut husks in place of soil and city water purified by reverse osmosis. At this point the farm occupies just 5,800 square feet -- an eighth of an acre.

But it's producing -- and selling -- food. White-tablecloth restaurant chefs and grocery-store produce departments buy herbs and micro greens (the stem and first two leaves of a ...

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