PWD's Watersheds blog closes out the year with a list of 11 green missions accomplished in 2011, from innovative stormwater management projects and stream restorations to groundbreaking policy agreements and energy-generating solar arrays.

View of City Hall from the green roof bus shelter

Merry Christmas—and remember that good things come in small packages. Such is the case for PWD's green roof bus shelter demonstration project at 15th and Market streets. It's only 60 square feet, but its debut in June showed the city that green stormwater management can happen one small space at a time. We hope this project inspires Philadelphia residents to undertake their own green projects at home.