Concerned about the carbon footprint or "food miles" involved in getting your rutabagas from farm to market? You'll want to check out David Ferris's story in the new issue of Sierra, "Up On the Farm." Because what could be better than buying produce that was grown on the roof of the supermarket itself? In the article, Ferris contrasts two approaches to urban agriculture in New York City: the earthy rooftop farms of the Brooklyn Grange, and Gotham Greens' sleek hydroponic model. But other forms of urban farms are happening in metropolitan areas all over the world, from Chicago to Singapore.
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