The continuous growth of global energy demands, coupled with political instability in oil-exporting countries and the persistent threat of climate change, have led to increasing concerns over the widespread use of fossil-derived resources to meet present and future needs of the people. The transportation sector in the U.S., for example, is known to occupy about 72% of the nation’s total liquid fuel consumption (EIA, 2014), and still remains heavily dependent on both domestic and imported petroleum. Although recent analyses have predicted an optimistic reduction of approximately 2.1 million barrels (250 million liters) of gasoline per day over the next two decades, these projections are imperatively contingent on the increased penetration of biofuel and natural gas into domestic markets (EIA, 2014).