19.15.3 unrealized potential of lignocellulose fuel
Both grain-and sugar-based ethanol as well as vegetable oils used to make biodiesel fuel are not the best candidates for biomaterial fuels because they use only relatively small fractions of the plants consisting of the parts that have the most value for food, and raw material. A much more abundant source of fuel consists of the lignocellulose parts of plants, a material composed of large polymeric molecules with an approximate empirical formula of CH2O that composes the structural members of plants including tree wood, stalks, straw, corncobs, and leaves.