The Greenworks Philadelphia plan "recommends that the natural link between land and water be reconnected so that green infrastructure becomes the City's preferred stormwater management system."

The city will invest $1.6 billion in rain gardens, green roofs, tree plantings, rain harvesting barrels and porous pavers in order to deal with stormwater issues, especially "combined sewers."

Read Green City, Clean Waters
The City of Philadelphia’s Program for Combined Sewer Overflow Control

Go to the Greenworks Philadelphia webpage

For an overview, read The Philadelphia Inquirer story,
Breaking ground with a $1.6 billion plan to tame water

"This is the most significant use of green infrastructure I've seen in the country, the largest scale I've seen," Jon Capacasa, regional director of water protection for the U.S. Environmental Protection Agency (EPA).