http://www.kqed.org/.stream/anon/radio/quest/2010/08/2010-08-30-quest.mp3
Take a waste product like cow manure or trash, let it decompose for a bit and you'll soon end up with methane gas. Methane is powerful contributor to climate change. But it can also be captured and used to make renewable electricity. That's something farmers are experimenting with across California. But by solving one environmental problem, they're running headlong into another. Lauren Sommer has more.