A recent Treehugger post on Plantagon illustrates some of the concepts and explains some of the challenges of vertical and urban farming.
While I agree with some of the commentary that using urban real estate may not be the best option, I do believe that enclosed vertical farming will be important in the future. As climate change sets in over time, a lot of the land currently being used for crops will no longer be suitable because of either drought or increased temperatures. Enclosed farms have to potential to control the growing environment and will allow crops to be grown in places that would not be able to otherwise.
