Agence France-Presse: An internal European commission study has criticised a European Union (EU) plan to boost the use of biofuels in transport, concluding that their costs outweigh the benefits. A commission spokesman downplayed the study and insisted that the use of biofuels remained at the centre of its strategy to cut greenhouse gas emissions in Europe. The unpublished working paper was written by the joint research centre, the commission’s in-house scientific body. It comes ahead of a …