Why not grow grains, vegetables and fruits right where the expanding crowds of consumers are: in the middle of a city, inside a tall glass building? Poultry and pork could be reared there, too. A vertical farm would drastically reduce the fossil-fuel use and emissions associated with farm machinery and trucking, as well as the spread of fertilizer and its runoff. Crops could grow and be harvested year-round instead of at the end of one season, multiplying annual yield by at least four times. Urban agriculture could also convert municipal wastewater into irrigation water, reducing a city’s refuse problem. And consumers would get the freshest food possible, without pesticides.
Is this such a fanciful notion?
Read more at - 'Growing Vertical: Skyscraper Farming'