Green roofs could play a critical role in helping cities cope with extreme rainfall events in the age of climate change. The roofs essentially suck up stormwater like sponges if designed properly.
In a world of increasing urbanisation, density, pressure and, some say, isolation, there's a natural salve for stress, pressure and mental illness. And it’s right above our heads.
Green and cool (reflective) roofs are effective tools for cooling overheated cities. Research in Chicago shows that their impacts depend on local conditions, so planners should site them carefully.
Green infrastructure can be delivered relatively easily using existing planning processes. The main obstacle could be psychological: planners are wary of disruption to embedded practices.
It seems like a 'no brainer' to use urban greening to help cities adapt to increasing heat, but the uptake of green infrastructure, such as trees and vegetated roofs, surfaces and walls, is slow. Why?
Planting more trees in our cities is a good idea, but we need to remember to plan ahead for conditions those trees might encounter when they mature in half a century's time.
Built-up urban environments transform the resource of rainwater into wasted runoff. Low Impact Development mimics nature to help get stormwater into the natural water system.