Source: WIRED.COM, 5/31/17

Just after dawn in the Salinas Valley south of San Francisco, a raucous robot rolls through a field spitting clouds of vapor. It’s cutting lettuce heads with water knives—super-high-pressure beams—and gobbling up the produce. The heads roll up its mouth and onto a conveyor belt, where workers in hoodies and aprons grab the lettuce and tear off the loose leaves.
Right across the road, workers are harvesting lettuce the agonizing old-fashioned way...

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