NREL's Advanced Biofuels Research (Text Version)
Our world is really big—7.8 billion people—and they are always on the move. Providing these people with enough energy in the form of transportation fuels is an enormous challenge. Today's fuels come mostly from fossil sources—petroleum, natural gas, and coal—but the fuels for tomorrow will come increasingly from renewable sources like biomass, the largest sustainable source of carbon on the planet—enough in the United States alone to provide up to 30% of our transportation fuels needs annually.
