Fossil fuels, similarly -- we are trying to target fossil fuels and design so that you get fossil -- biomass to replace fossil fuel, but biomass based on, for example, woody materials, based on agricultural waste like wheat straw, corn cobs -- agricultural waste, lumber waste residues -- that's very inexpensive feedstock.

WHITEHOUSE: Press Briefing

His mission: to spread the word about the virtues of home-grown American fuel made from stuff that normally gets thrown away, or in the case of corn cobs, plowed back into the fields.

FORBES: Taking A Ride In A Corn-Cob-Powered Truck