Exterior and Green Roof Material Take a look at some of the most exciting, sustainable buildings around the world, and you may notice something they have in common: green roofs, or rooftops covered with a thin layer of soil to allow for grasses and other low-lying plants to grow.  Photo 2 of 6 in A Two-Part Landscaping Renovation in San Francisco

A Two-Part Landscaping Renovation in San Francisco2 of 6

For his family’s recently remodeled home in San Francisco, designer Peter Liang undertook a two-part landscaping renovation: He planted a living roof, then, with the help of landscape architect Andrea Cochran, redid the backyard.

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