Dean Fosdick / AP
Succulents, including cactus, are generally the plants of choice for green roof projects, like the demonstration garden on the roof of the American Society of Landscape Architects headquarters building in Washington, shown in this June 25, 2007 photo. They can live on existing rainfall, withstand drought, wind and harsh winter conditions.
Photo Staff
- Christopher DeVargas
Photographer - Steve Marcus
Photographer - Sam Morris
Photographer - Leila Navidi
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