Key points are not available for this paper at this time.
Biofuels are being employed in nearly all the EU member states to fulfill the targets set up by the European Directive 2003/30/EC to have a 5.75% share of renewable energy in their transport sector by 2010. In Sweden ethanol is the leading biofuel; while biogas mainly depend on local initiatives with the city of Linköping as a case in point.
Sharkey et al. (Thu,) studied this question.