Low impact development is an approach to land development (or redevelopment) that incorporates natural features to manage stormwater and protect water quality. Low impact development minimizes runoff by promoting infiltration, evapotranspiration, and collection for use through natural landscape features and fewer impervious surfaces. The result is a functional and visually appealing development that treats stormwater as a resource, not as waste. 

Green roofs are roof surfaces planted with living plants. Green roofs can protect waters from pollution because they absorb and delay rainfall runoff, thereby reducing pollutants from stormwater runoff.