Jesse Fenn leaned over a row of young lettuce sprouting in neat formation like a farmer crouching over a field of produce – only Fenn’s field extended 25 feet below him. Fenn stood atop a scissor lift ...
At a greenhouse in Mesa, Arizona, nine-foot towers of tomatoes and cucumbers and other assorted vegetables reach skyward, bathed in diffused natural light. “We can grow 10 times the food using 90 to ...