Scientists have found a way to use the cotton plant, long a source of fiber for clothing but inedible by humans, to feed potentially half a billion people a year.

http://today.reuters.com/news/articlenews.aspx?type=scienceNews&storyid=2006-11-21T000321Z_01_N20300910_RTRUKOC_0_US-FOOD-COTTONSEED.xml&src=rss&rpc=22