Rooftop Gardens

Associated Press
This undated photo courtesy of Joyce Sood for the GLIDE Foundation shows the rooftop garden at the Glide Memorial Church in San Francisco. As more people turn to roof gardens to grow their own food, they are coming up with all kinds of ways to keep those gardens light and avoid sagging and cave-ins.   (AP Photo/GLIDE Foundation, Joyce Sood) NO SALES

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Seen as a positive force for the environment as well as a great way to save money by growing your own dinner, rooftop gardens are blooming in cities over the globe from the WWF building in Washington D.C. to London's East End.

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