02/10/2009 05:12 am ET Updated May 25, 2011

GREEN Treehugger: 6 Clean Start-Ups To Watch In 2009

2008 was a banner year for green tech start ups. While the economy crashed, investments in clean technology stayed relatively strong. We're taking a look at the top techy start-ups to follow as the new year begins.

Read more on Treehugger