|  |  | 8 Great Green Roofs: Bomb Shelters to Hobbit Holes [w/PICS] weburbanist.com — A green roof can be much more than just a lawn on a building, and the concept is much older than many people realize. Creative green roof designs date back to the Hanging Gardens of Babylon. As impressive as those were, however, some modern examples have begun to rival them in terms of complexity, ingenuity and (of course) sustainability.More... (Environment) Comments Email Added 2007-12-12 08:00:09 suxmonkey