In the European efforts to move to fossil-free, carbon dioxide-free transportation fuels, natural gas and LPG will play key bridging and supplementary roles, according to a report presented Jan. 25 to the European Commission by its stakeholder expert group on future transport fuels.Alternative fuels, said the report, have the potential gradually to replace fossil energy sources and make transportation sustainable by 2050. The EU will need an oil-free and largely CO2-free energy supply for transport by 2050 due to the need to reduce its impact on the environment and to concerns about the security of energy supply, said the commission's announcement.The EU's expert group has for the first t...