Corn is being blamed as responsible for global food shortages. Although the United States has consumed significant amounts of corn for biofuel, this usage is unconnected to short­ages of rice, wheat and fruits and vegetables. At most, corn may account for 20% of the current food shortage. Corn is less efficient than sugar cane or sweet sorghum in terms of its biofuel-energy content, but it’s a good starting point on which we can build.