Nate Storey, founder of a startup in the burgeoning agtech sector, which applies high-tech solutions to agriculture and farming, is convinced that the future of vegetable production is vertical and indoor cultivation, an approach that allows crops to be grown anywhere in the world to supply local markets. His company, Plenty, has just demonstrated that about two acres laid out vertically and growing hydroponically, produces more than a conventional farm covering some 720 acres.