BIOFUELS: 'Forever young' duckweed has big potential as raw material Amanda Peterka, E&E reporter Published: Thursday, February 20, 2014 A flowering plant no larger than a pencil-tip eraser might emerge as an important raw material for biofuels. Please subscribe to Greenwire to read the full story. Username: Password: Forgot your access codes? Recover them. Not a subscriber? Sign up for a trial. Ready to subscribe? Click here.