随着城市化的快速推进,生态环境恶化、热岛效应严重、极端恶劣天气增加等已经成为很多城市可持续发展中面临的突出问题。然而,更为棘手的是,尽快修复城市生态似乎并没有太多的办法:城市规划绿地以及城市道路沿线、街头空地、市政公用土地、单位周边等,进行“见缝插绿”之后,其绿化已达到近乎“饱和”的状态,靠大量拆迁重建绿地的路子不通;靠多占地搞常规绿化,因土地资源过度消耗日趋紧张更不实际;各类建筑密度大大增加,城市中可“见缝插绿”的空间将越来越少。在此情况下,约占城市总面积20%的闲置楼顶,无疑是可以大有作为的宝贵资源。屋顶绿化,可以广泛地理解为在各类古今建筑物、构筑 With the rapid urbanization, the deterioration of the ecological environment, the serious heat island effect and the increase of extreme weather have become prominent problems in the sustainable development of many cities. However, even more troublesome is that as soon as possible to repair the urban ecology does not seem to have too many ways: urban planning and green space along the city roads, open space, municipal public land, around the unit, etc., “ Its greening has reached the status of almost ”saturation “, relying on a large number of demolition and reconstruction of green space barrier; by covering more land for conventional greening, due to land resource over-consumption of increasingly tense and impractical; greatly increased the density of various types of buildings, urban May ”sew plug green " space will be less and less. Under such circumstances, idle roofs, which account for about 20% of the total urban area, are undoubtedly valuable resources for great accomplishments. Green roofs can be widely understood as buildings in various ancient and modern buildings