A local delegation reports on a recent visit to Switzerland to study the covering of thousands of buildings with living roofs. The Swiss model of green roofs is lighter, cheaper and richer in biodiversity than many American counterparts. How can we learn to develop a sustainable, affordable model to better reap the benefits of green roofs?
+ Laura Tam / SPUR
+ Kay Cheng / San Francisco Planning Department
+ Lisa Lee Benjamin / EvoCatalyst
+ Kendra Hauser / California Academy of Sciences