Green roofs energy savings. www.globalchange.com Data from Chicago, Tokyo, California, New York, Australia, Toronto, Germany, Reduction of roof temperature, city climate, heat island reduction, cooling savings, environmental. High rise blocks with ventilation costs. Retrofitting. Open living spaces, carbon-neutral buildings with natural light, renewable power generation. Wind turbines on roofs and solar cells. Payback period of renewable energy generation. Falling solar cell costs. Solar …


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