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How Google Earth Revealed Chicago's Hidden Farms

Uncommon Ground, a <a href=&quot;http://www.uncommonground.com/pages/organic_roof_top_farm_home/200.php&quot;>certified green</a> restaurant in Chicago, hosts an organic farm on its rooftop. (Uncommon Ground)
Uncommon Ground, a certified green restaurant in Chicago, hosts an organic farm on its rooftop. (Uncommon Ground)

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