Research at American University shows that green roofs prevent pollution runoff.
(2014) America University Communications and Marketing. New research from American University shows that green roofs also absorb pollutants. The research, which takes on an area that previously has not been explored widely by scientists, has implications for how cities can improve the health of their rivers, streams and estuaries.
“The potential is that institutions and businesses could reduce their pollution footprint,” said Stephen MacAvoy, assistant professor of environmental science at American University. “If large numbers of green roof systems were installed throughout Washington, D.C., they would contribute greatly to keeping harmful nutrients and suspended solids found in runoff from entering the city’s waterways.”