Jennifer Nelkin believes that the future of high-end, boutique-quality farming is not in California, sunny Florida, or even the fertile soils of the Hudson Valley. It's right under our noses. Or more accurately, right above our noses. As co-founder of Gotham Greens, New York's first commercial rooftop hydroponics operation, Jenn's got a lot riding on that future. "I really hope that rooftop gardening is a successful venture, because we've borrowed $1.4 million to try and find out." More