http://www.kqed.org/.stream/anon/radio/quest/2010/01/2010-01-11-quest.mp3
Americans throw away a staggering 31 million tons of food each year. As those scraps decompose they create methane - a powerful greenhouse gas - that could be harnessed to light our homes one day. As Tara Siler reports, a wastewater treatment plant in the Bay Area is leading the way.