http://www.kqed.org/.stream/anon/radio/quest/2008/01/2008-01-04-quest.mp3
If investment is any guide, California's renewable energy companies are leaping into the new year. Investors poured billions of dollars into clean tech firms in 2007 to catapult green technologies to market. Lauren Sommer followed the trail to several Bay Area companies to see what breakthroughs lie ahead.