http://www.kqed.org/.stream/anon/radio/quest/2007/07/2007-07-20-quest.mp3
Over the last few years we've all been asked to tread more lightly on the planet - use less energy, less gasoline and less water. Now a growing movement of do-it-yourself-eco plumbers are testing the limits of just how green you can get before running into trouble with the law.