* What benefits does installing a green roof have on a building?
* Do green roofs help the environment?
* What types of plants survive on a green roof?
* How do you maintain green roofs?
* How much does a green roof cost?
* What soil is used on a green roof?
* Are there green roofs in the area? If so, where are they?
* What are intensive and extensive green roofs? Differences between them?
* Is there a market for green roofs in North America?
Added by agreenermaryland on May 3, 2007