Global climate change and population growth has become the droning broken record of our age. It's a well know prediction that we'll reach almost 10 billion people by 2050, most of which will be living in cities and we have to quickly figure out how to keep everyone fed. The first steps, I believe, are ones of reform. Better legal avenues for food production infrastructure, more agricultural education, and a greater social emphasis on sustainability would help tremendously to kick start the slow migration of food from massive and secluded monoculture farms to the urban centers.
Furthermore, the key to overcoming the high prices of urban real estate would be through the integration of food production within the everyday facets of city life. One of the greatest assets in aquaponics is that the process can be extensively customized. Nutrient rich effluent from fish can be pumped great distances, limited only by the power of the pump so massive circulatory networks can be made to connect high producing grow beds with several fish tanks. This, of course, is a fantastic vision of the many possibilities that aquaponic opens up. Regardless of the method used to produce food one aspect remains the same: to achieve something we do not have, we must do something we haven't done. One of the unfortunate consequences of modern farming is that it removed the product from the consumer. For the most part a consumer is not involved with the production of his or her food, there's no second thought as to how it was grown, transported, sold or even marketed as the world of agriculture as secluded and misunderstood as it is wasteful.
To further prove this point let me describe the gauntlet a head of lettuce has to endure to sit on the shelf of your local grocery store. First, seed suppliers provide proprietary phenotypes of lettuce to the grower/farmer who then grows it out as fast as possible because their life depends on it. If the lettuce is going to be chopped for a salad it must be first sold to a processor as the farmer cannot legally cut it, otherwise it's sold to a distributor. Distributors require the lettuce to meet produce weight and attractiveness standards that cause approximately half of what is grown to the landfills, but if the lettuce is deemed worthy by the distributor it is then packed and shipped once more to retailers who can then sell the lettuce to you. Just as in the natural food chain, there is a loss of resources every time the lettuce exchanges handlers. Petroleum is used to harvest, transport, and refrigerate, the price tag keeps going up to accommodate the profit margins of the middle man, and a compromise in produce quality and nutrition is made in favor of greater shelf life and transportability.
This is all to say that we don't just need a new method of food production, we need a new system. Food can no longer remain an afterthought for the public to take for granted. I believe that reintroducing food production into the spotlight of modern life would have great results as it would instill a sense of respect to food. We cannot afford to continue dumping our food in landfills or sustain massive global food transport.