Book excerpt: "Green Roofs defines the types of green roofs both extensive and intensive; introduces the vocabulary of green roofs; details the components available; describes the design and development process; lists recommended plant materials; and explains methods of installation, irrigation, and maintenance. Approximately 70 vivid and detailed case histories of major projects in Europe, where green roofs began, and contemporary examples throughout North America, copiously and beautifully illustrated with almost 400 images, make this book an invaluable guide to the state of the art."--BOOK JACKET.