green rooftops. Long popular in Europe, green rooftops have begun to appeal to homeowners, businesses and even cities as an attractive way to promote environmentalism while solving the problems of conventional roofs.
On a wider scale, green roofs improve air quality and help reduce the Urban Heat Island Effect, a condition in which city and suburban developments absorb and trap heat.
Green roof of Chicago City Hall
In some part of south-Korean, they painting their roof with green color, first beautify the urban environment, at the same time it definately save more money than do real planting greening.
Secondly, the design of the roof in South-Korea is also for collect water from rain, it can save nature sources and recycled.
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