The 30-minute version of the Green City, Clean Waters video will premiere on MIND-TV (formerly WYBE-TV 35, check your local listing) at 8 p.m. on Saturday. The Philadelphia Water Department enlisted GreenTreks to convey the message of a 20-year, $1.6 billion plan to use green stormwater management to alleviate combined sewer overflows from the city's aging sewer system. Green City, Clean Waters looks at how green stormwater management is transforming the city into an oasis of rain gardens, living roofs, treescapes and porous pavements—all of which, say advocates, is cheaper than traditional infrastructure and makes for a more liveable, prettier city with higher property values and better community health. Watch the preview above and set your DVR!