MAY 2011 - General Services Administration
The Benefits and Challenges of Green Roofs on Public and Commercial BuildingsA Report of the United States General Services AdministrationMAY 2011Front cover: Image of the green roof on the United States Department of Transportation Headquarters GSA GREEN ROOF BENEFITS AND CHALLENGESTABLE OF CONTENTSCONTENTSEXECUTIVE Purpose of Study ........................................ ........................................ ........................................ ........... Methodology.
storm sewer systems, contributing to flooding and water pollution—creating environmental and human health hazards, particularly where stormwater and sewage systems are combined. Excessive stormwater runoff erodes soils and river banks and adds sediments and street pollutants to water bodies. There is a third type of roof that is increasing in
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