Green roofs are the great green hope of many environmentalists, politicians, and architects interested in more efficient and environmentally aware buildings. From a design standpoint, however, there is less consensus. While some see the roof garden as a visual statement using plants, geometric lines, and sculptural elements, others believe concerns for sustainability should outweigh visual appeal. A green roof that combines aesthetics and mechanics has become the goal of many a landscape architect. In Green Roof Gardens, author Christian Werthmann explains the history, methodology, and design process of green roof garden construction, providing a rich source of inspiration and technical knowledge in the process for anybody interested in this simple solution to many of the environmental challenges we face today.