Dong Jing, Guo Fei, Lu Xiaodong, Zhang Hongchi

Keywords： Green Roof; Green Wall; Green Infrastructure; Public Policy; London

Abstract：

In the context of the global push for green and sustainable development, green roofs and green walls have garnered extensive attention in the development and construction of high-density urban areas, which are important means to alleviate the negative environmental impacts associated with urbanization. While these technologies are widely used in some European and American cities, their development in China has lagged relatively behind. Green roof and green wall pioneer cities worldwide have implemented promotion policies for more than 40 years. London, which has had a policy in place for only 10 years, has made remarkable achievements in a short time, is becoming a relative newcomer on the urban greening stage. Unlike many other cities that promote urban greening (especially green roofs) through providing various forms of tax reductions, financial subsidies and incentives, it has been achieved primarily through the land-use planning process of the three-tier (national–regional–local) planning system. Taking London as an example, this paper analyzes the development history and construction of its urban green roof and green wall policies, and summarizes the experiences that can be applied to the sustainable development of green roofs and green walls in China from three aspects: the policy basis driven by environmental issues, the policy combination coordinated by administrative hierarchy, and the technological innovation for compound goal achievement.

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