United States Environmental Protection Agency: Green Infrastructure

This page, from the United States Environmental Protection Agency (EPA), offers information on green infrastructure, or the use of "natural hydrologic features to manage water and provide environmental and community benefits." In addition to basic overviews of the green infrastructure and its social and environmental impact, the page offers tools ranging from funding to policy and regulation resources, case studies, research on areas like groundwater impacts and economics, a library of resources, and EPA contacts.