If it's seems like years ago that I wrote about Philly's innovative stormwater infrastructure plan, that's because it was. Philly announced the -- literally -- groundbreaking plan to invest billions in building green roofs, permeable concrete sidewalks and other techniques so as to avoid investing several times that amount in sewer lines, holding tanks and other old-style stormwater solutions. Via Tyler Falk at SmartPlanet, the city announced that the EPA and the Pennsylvania Department of Environmental Protection have both given the ambitious plan the "green" light:

Labels: infrastructure, politics, smart_growth