Portland (Or.). Bureau of Environmental ServicesPortland (Or.). Office of Sustainable DevelopmentPortland (Or.)2008-12-182008-12-182000http://www.portlandonline.com/river/index.cfm?c=39360&a=88545https://hdl.handle.net/1794/814915 pp. Bookmarks supplied by UO. Illus. Published 2000. Captured December 17, 2008.Based on documented experience and studies, an ecoroof offers several important benefits not found in conventional roofing. [From the document]en-USCommunity development -- Oregon -- PortlandCity planning -- Oregon -- PortlandBook