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Kimberly Powell

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If green roofs were mandatory in cities would there be less development and building?

William McDonough knows the benefits that come from designing and implementing green roofs. McDonough has helped design living roofs for big companies such as Nike and Ford Motors. But many companies and homeowners overlook the benefits of green roofs. One benefit of green roofs is that they keep the internal temperature of a building steady throughout the year. The National Research Council of Canada found that having a green roof reduced the daily energy demand for air conditioning in the summer by 75%. Toronto is the first North American city to pass a law mandating green rooftops for all new residential, commercial and industrial developments. Any new construction with floor space of more than 2,000 square meters must devote between 20 and 60 percent of its roof to vegetation. But with green roofs comes an unwanted financial upfront cost. Will developers decide that the benefits outweigh the costs for installing green roofs?

If green roofs were mandatory in cities would there be less development and building?

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    May 23 2012: I do not think that green roofs would limit building. Building cost are already high and adjusting for a green roof would not add that much cost relative to the cost of the whole building. I personally think green roofs should be mandatory for all new buildings, especially new government buildings. If the government started adopting green policies such as this it would have a positive effect on the industry and the environment. Green roofs are also very beneficial for pollination. If green roof companies created an alliance with pollination biologists and honey producers we could slow the decline of honey bees.

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