
A dinner in Brooklyn helped send Viraj Puri into rooftop farming. After building Gotham Greens into a national food business, he now guides the company from a different seat.

The roboticist who once taught machines to navigate offices is now giving them watering cans - and asking whether a greenhouse can compete with a field on price.
Hippo Harvest is a California controlled-environment agriculture company that grows USDA-certified organic leafy greens inside greenhouses run by warehouse-style robots and machine learning. Founded by two veterans of the ROS robotics world, it repurposes Amazon-fulfillment-style autonomous mobile robots as 'tractors' that deliver water and nutrients plant-by-plant, claiming greens grown with roughly 92% less water, 55% less fertilizer and 94% less land than field agriculture - at prices meant to match outdoor-grown produce.