Here is an interesting video and article about a company that is taking urban indoor farming beyond its pie-in-the-sky roots and actually implementing working, profitable systems. I applaud them for this. The only thing is that, while the vegetables produced are classed as organic because they use no synthetic chemical inputs, I don't imagine this system could be considered very sustainable. It is entirely dependent on electric pumps to provide an aerosol spray for plant roots, and electric lights for plants to grow under. There is apparently no sunlight, no ecosystem processes involved. I guess it's what might be called "synthetic organic" or something to that effect.