Via New York Magzine: Dr. Dickson Despommier, a professor of environmental sciences and microbiology at Columbia University, believes that “vertical farm” skyscrapers could help feed cities, and fight global warming. To that end, he's conducted a comprehensive study on the costs and projected benefits of 'skyscraper farms' in urban settings. These structures would not only provide organic crops year-round, but would also collect rainwater, treat blackwater, create energy through solar, steam, and wind power, and bring peace to earth (um, just kidding on that last one, unfortunately). The vertical farm could grow fruits, vegetables, grains, and even fish, poultry, and pigs. Enough, Despommier estimates, to feed 50,000 people annually.
And the price tag? Roughly $200 million per farm for startup costs, and the idea is for each 'farmscraper' to be self-sustainable.
Details at VerticalFarm.com. Check it out!