Science Daily: Biofuels are widely considered one of the most promising sources of renewable energy by policy makers and environmentalists alike. However, unless principles and standards for production are developed and implemented, certain biofuels will cause severe environmental impacts and reduce biodiversity – the very opposite of what is desired. Corn-based ethanol is currently the most widely used biofuel in the United States, but it is also the most environmentally damaging among crop-based …