The Scientific Technology Options Assessment (STOA) body of the European Parliament has published a report called “Alternative Technology Solutions for Road and Air Transport”. In this report, the pros and cons of energy alternatives categorized into 5 technologies (hydrogen/fuel cells, battery electric vehicles, hybrid technology, biofuels and natural gas) were analyzed.  With respect to biofuels, the report states that “second generation biofuels” (cellulosic ethanol and biomass-to-liquids technology) present a long term viable option. Biogas or biogas/natural gas blends for transport fuels are also a possible scenario. To meet Europe’s biofuel needs, biomass may have to be imported from abroad..