Storm-water footprint enters water bill equation in Philadelphia

01/17/2012 | ScientificAmerican.com

Philadelphia has a problem with storm water, but that could change with its planned green infrastructure. Instead of building bigger tunnels to handle overflows, the city is adding rain barrels, vegetation and "sponge-like roads" to absorb more rain as it falls. The city plans to charge not only for the water that residents and businesses use, but also for how much they contribute to runoff. Incentives are provided for green roofing, porous pavement and other mitigating techniques.

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