ABSTRACT
Over the past decade, a renewed interest in biofuels has arisen as concerns about energy security, fuel prices, and the adverse impacts of global climate change have grown. Government support has been especially strong for biofuel programs in the US, European Union (EU), and Brazil, although not without controversy. Environmental groups are concerned about possible deforestation from an increase in cropland, and concerns have arisen over the use of food-crops for fuel instead of food.
