Currently two types of biofuels are being used in significant amounts around the world: ethanol and biodiesel. Ethanol is produced in large amounts from maize in the United States, sugarcane in Brazil and in smaller amounts from wheat and sugar beet in Europe. Biodiesel is produced predominantly from rapeseed in Europe, palm oil in Asia and soybeans in Brazil.The use of ethanol is bound to increase very substantially in the next 10–15 years due to mandates adopted by governments.It is difficult to know how much ethanol will be needed in the future but it is estimated at least 1 billion gallons.Such large demand and the corresponding use of agricultural land needed for its production has as generated a number of objections to the use of biofuels. According to Professor José Goldemberg, though, these concerns are largely exaggerated.
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