From a site that encourages green building:
“Designing your home to reduce stormwater runoff helps protect Arlington’s streams, the Potomac River, and ultimately the Chesapeake Bay. Minimize the building footprint and reduce driveway pavement. Use water from downspouts to water the garden. Save existing trees on the site. Use native plant species for your landscaping. These are just some ideas to make your home an environmentally friendly place!”