Robots are already farming crops inside this Silicon Valley warehouse

Inside a cavernous warehouse in South San Francisco, 16-foot-tall walls of kale and other greens stretch down aisles twice the length of a bowling lane. Matt Barnard, CEO and cofounder of Plenty, the startup that designed and built the indoor farm, points to two types of mustard greens called mizuna and tatsoi. “This is one of the blends that we are working to position against junk food,” he says.