Have you ever wondered how we're going to grow food on the moon? Or Mars? Or just find ways to reduce food miles and food waste here at home? All while producing more food with less land, less water and closer to the communities where we live and work? High-tech greenhouses are looking like the answer. Just a few acres of greenhouse space can produce more food than an entire conventional farm, with a fraction of the water and other inputs. We visited Red Sun Farm's Dublin, VA showcase to take a look at where farming is heading next.