Here’s a good reason to build rain gardens and green roofs, and to plant and protect trees: It’ll save you money. That’s the conclusion of a new report from the American Association of Landscape Architects called “Banking on Green.”
The study surveyed green stormwater projects from across the US, plus a handful from Canada, and determined that in 41 percent of the cases, the environmentally friendly approach was cheaper than if a conventional solution for runoff was used.
The work builds on previous research by the US Environmental Protection Agency, ECONorthwest, the University of New Hampshire, Seattle Public Utilities, and others who have come to similar conclusions about cost savings.
The “Banking on Green” report also provides a list of 479 green infrastructure case studies organized by state. It does a nice job compiling current research that explains and quantifies the many problems caused by polluted runoff, and it offers the most effective solutions for addressing these problems. But it’s not everything I could hope for.



