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[[File:MLSmith swale.jpg||thumb|500px|[[Enhanced swale]] with rocky [[check dams]] and a metal [[overflow]] grate in Northgate Mall parking lot, Seattle. Photo credit: [[Acknowledgements| MLSmith]].]]

[[File:Green Roof - main pg toronto.PNG|thumb|500px|[[Green Roof]] located in Toronto, ON. To read more about the life cycle costs and savings associated with building and owning a green roof in the GTA, check out the STEP report ["An Economic Analysis of Green Roofs", here| https://sustainabletechnologies.ca/app/uploads/2013/03/GR_york_fullreport.pdf]. (Photo Source: STEP, 2007<ref>STEP. 2007. AN ECONOMIC ANALYSIS OF GREEN ROOFS: Evaluating the costs and savings to building owners in Toronto and surrounding regions. ©Toronto and Region Conservation Authority. https://sustainabletechnologies.ca/app/uploads/2013/01/GR_Econ_Full-document.pdf</ref>]]

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