Getting the Green Roof Right

We thought this was a nice summary of some of the planning constraints on building successful green roofs:

"The first common dilemma in the construction of living green roofs, and other landscapes over structure, is that, in conventional building, the execution and completion of site work are often subordinated to the completion of the building."

Read the full article from Architecture Week, here:
http://www.ArchitectureWeek.com/2009/0527/building_1-1.html