Biodiesel, a fuel comprised of mono-alkyl esters of long chain fatty acids derived from vegetable oils, animal fats, or mixtures thereof, is produced by transesteri- cation, with glycerol being produced as a co-product. Worldwide, 1 billion tons of diesel fuel are consumed annually. The total feedstocks available for food, feed, and industrial applications are 115 million tons. This represents less than 12% of diesel fuel use. The opportunities for the future for biodiesel include improvements in the conversion technology, which appears promising, and expanding the amount of available feedstock through various plans to increase oil yields or oilseed production.