From using vegetable oil and animal fats to trees and grasses as new sources of energy, biofuels are continuing to gain attention due to current oil prices and concern for energy security. As energy is produced from carbon fixation in these biofuels, scientists are experimenting with other types of renewable sources as mediums. The latest research endeavor? Creating jet fuel from seawater. Last year, the U.S. Navy Military Sea Lift Command, who is in charge of supplying fuel and oil to the U.S. Navy fleet, delivered nearly 600 million gallons of fuel to vessels underway, operating 15 fleet replenishment oilers around the globe. Refueling U.S. Navy vessels at sea is not only costly, but the process requires a lot of time and coordination, which can ultimately affect national security.