"Going green" can mean literally just that -- turning your community green with foliage. And green space is exactly what it sounds like: It's the amount of open space reserved for plants and trees, gardens, parks and nature preserves. Green space improves air quality, cuts pollution levels and energy costs, and adds to the aesthetic of the city.
Some cities are finding innovative ways to include green space in their urban landscape. In 2000, the city of Chicago planted a garden in place of the black tar roofing on a city government building. Green roofing offers similar benefits to gardens and parks at ground level by helping to reduce urban heat islands. Green rooftops also add a layer of insulation to the building, keeping it warmer in the winter and cooler in the summer, reducing the building's energy costs.
[http://mtamazingfact.blogspot.com]
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