BIOFUELS: Bipartisan senators offer bill to extend lapsed biodiesel tax incentive Amanda Peterka, E&E reporter Published: Friday, February 14, 2014 A bipartisan pair of senators this week introduced legislation to extend the $1-a-gallon biodiesel tax credit. 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.