This may be an idea whose time will shortly come if food prices ever rocket higher due to transportation costs. Any city in the world could grow fresh, local, organic fruits and veggies using this system:
VertiCrop – The Solution
In a rapidly urbanizing world where the majority of people now live in cities, localization requires that food and fuel be produced in an urban context. At present, there are no examples of a locally sustained urban community anywhere in the world. Urban sustainability is yet to be realized primarily because urban agriculture presents a number of technological challenges. The main challenge is a lack of growing space.
Vertical growing is a new idea currently emerging in the sustainability discourse which offers great promise for increasing urban production. Vertical growing systems have been proposed as possible solutions for increasing urban food supplies while decreasing the ecological impact of farming. The primary advantage of vertical growing is the high density production it allows using a much reduced physical footprint and fewer resources relative to conventional agriculture. Vertical growing, hydroponics and greenhouse production have now been combined into an integrated commercial production system, a system that has major potential for the realization of environmentally sustainable urban food and fuel production.