Green infrastructure and ecosystem service
We have to manage ecosystem services and natural capital for sustainable development of human beings, which has become an international consensus since the end of 20 century and was popularized by the Millennium Ecosystem Assessment (MA) in the early 2000s. Natural capital is the world's stock of natural resources. Natural capital assets provide people with a broad range of free goods and services, called ecosystem services, which underpin our economy and society and some of which even make human life possible. Green infrastructure has been widely paid attention as a key concept for wise use and management of ecosystem services. Green infrastructure occurs at all scales. It is most often associated with storm water management systems, which are smart and cost-effective. However, green infrastructure is a bigger concept and is closely associated with many other things.