Munich Personal RePEc Archive

Report on the Environmental Benefits and Costs of Green Roof Technology for the City of Toronto

Doug, Banting and Hitesh, Doshi and James, Li and Paul, Missios (2005): Report on the Environmental Benefits and Costs of Green Roof Technology for the City of Toronto.

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Abstract

This report presents the findings on the municipal level benefits of implementing green roof technology in the City of Toronto. Beyond this report, which addresses the immediate needs of the City of Toronto in assisting them to formulate appropriate programs and policies, the Ryerson team has been charged by OCE-ETech to develop a generic technological solution that can be used to predict the costs and benefits related to green roofs. This work is ongoing and is not reported here. Of the many benefits of green roofs reported in the study, the ones that had the most quantifiable monetary value based on currently available research data are: benefit from stormwater flow reduction including impact on combined sewer overflow (CSO), improvement in air quality, reduction in direct energy use, and reduction in urban heat island effect. The literature review indicated other benefits that could not be quantified in this report. These benefits included: aesthetic improvement of urban landscape, increase in property values, benefits resulting from green roofs used as amenity spaces, use of green roof for food production, and increased biodiversity. Further work is needed to quantify these benefits.

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