Growing Roofs: Atop New York's buildings, the seeds of greenery spread.

This article highlights rooftop gardens in buildings in New York initiated by Earth Pledge, a nonprofit organization devoted to creating green roofs. Agenda of the organization; Challenges facing Earth Pledge in implementing its agenda; Advantages of green roofs; Activities of the organization to promote green roofs; Background on the roof garden project on the roof of the Revella building.