Well our friendly huggers were almost right, it is almost possible to make biofuels economically in Europe using raw materials dragged across the world.. Here’s the punch line from the abstract (you can’t get any more because its from an expensive, academic journal)
Co-production of "green" FT transportation fuels and "green" SNG will be an economic feasible process in The Netherlands when both energy carriers receive the same tax exemptions as those currently given to green electricity.
So you could do it if there were tax breaks. The trick seems to be to use the side stream from the Fischer-Tropsch plant you are using to make transportation liquids to make synthetic natural gas. This means you convert more biomass and increase the value of the asset (factory) that you are using to do it. Ta dah!