With reports of fresh fruit and vegetable shortages sending healthy eaters into a salad spin, it may be time to grow your own. Not all of us have green fingers, nor the space or time to garden, but help is at hand. There are some amazing hydroponic systems out there, which use only water, light and oxygen, along with smart technology, to produce a wide range of fruit and vegetables in small urban spaces. Growing your own to feed the family can be as easy as flicking a switch.