Green Roofs Green roofs have taken off in the past few years. Ed Snodgrass—green roof expert—suggests that gardeners considering a green roof should start with greening the topper of a doghouse or birdhouse. As for plant choices, Snodgrass suggests low-growing hardy sedums and other hardy succulents—with color accents coming from perennials like phlox or dianthus and small bulbs such as muscari and crocus.
I love the concept of grass and vegetation on the roofs of homes. The curve design of the roof helps with utilizing rainfall for optimal use of the fresh rain water. Instead of having typical roof components utilizing nature as an alternative make for sustainable design (Jordan Boyer).
Farm house located in Keldur, Iceland (o Earth sheltering is the architectural practice of using earth against building walls for external thermal mass, to reduce heat loss, and to easily maintain a steady indoor air temperature. Earth sheltering is popular in modern times among advocates of passive solar and sustainable architecture, but has been around for nearly as long as humans have been constructing their own shelter.