This supports the finding of our hydrogen paper, that hydrogen fuel cell vehicles have nothing to offer and are a pointless distraction. Instead we should be concentrating on producing sustainable liquid fuels. These could be bioethanol as discussed in this study, produced either from sugar cane, as in the Brazilian example, or as a 'Second Generation' biofuel, probably based on 'ligno-cellulosic' - 'woody' - feedstocks . Another possibility is a liquid fuel synthesised from Carbon Dioxide captured from flue gases and hydrogen produced by electrolysis, using renewable electricity. This is outlined in our hydrogen paper. Such fuels would have the advantage of overcoming the land area - and water and nutrient - constraints on biofuel production, while being carbon neutral. Their production should be integrated with that of Combined Heat and Power - with the carbon dioxide captured from the flue gases - and the use of 'surplus' electricity from wind farms. This is because energy can be 'cascaded' through all three processes, and heat and liquids can easily be stored, even if the wind electricity is variable, so that almost none need be wasted. This is already standard practice in modern chemical plants. Indeed, one plant could produce both from biomass feedstock - as in a Biorefinery - and by synthesis. As liquids such fuels can readily be handled by the existing infrastructure and used by the existing worldwide vehicle fleet of some 800 million. New vehicles can also continue to increase in fuel efficiency, probably with an increasing proportion of engine-electric hybrids.