Abstract
U.S. energy policy has seen a dramatic shift toward renewable fuels within the last 10 years. While much research has been conducted in regards to U.S. biofuel policies, a significant arena of debate has been neglected. A key argument in favor of domestic biofuel production is that it is a renewable path towards energy independence. However the inputs used in the production of biofuel feedstock, primarily fertilizer nutrients, are anything but renewable. With simple calculations, this paper shows that the U.S.’s current biofuel policy is heavily dependent on non-renewable nutrient inputs. Thus, the question of how renewable the current plant-based biofuels are needs to be asked.
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