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London's Garden Squares Are Opened To The Public

LONDON, ENGLAND - JUNE 09: Azul Thome, the co-founder of 'Food from the Sky,' stands in the roof garden above a supermarket in Crouch End on June 9, 2011 in London, England. The roof garden, the produce from which is sold in the Budgens supermarket below it, is participating this year in the Open Garden Squares Weekend on June 11 and 12th. The Open Garden Squares Weekend lets members of the public purchase a ticket to give them access to over 200 gardens across the capital, many of which are usually private. (Photo by Oli Scarff/Getty Images)

Rooftop Gardens

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.