What is green infrastructure?

Green Infrastructure is the network of natural and semi-natural features, green spaces, rivers and lakes that intersperse and connect villages, towns and cities. It is a natural, service-providing infrastructure that is often more cost-effective, more resilient and more capable of meeting social, environmental and economic objectives than ‘grey’ infrastructure.
 
It effectively reduces the need for constructing or renovating traditional, unattractive uni-functional grey infrastructure elements like concrete pipes, floodwalls or holding tanks.  It is a vital infrastructure from which economic, social and ecological benefits can be gained if it is managed and planned appropriately.