Sustainable transport: biofuels can't be the only answer European Union Member States have to transpose into national law by 2017 a new directive setting a 7% cap on first-generation biofuels in the transport sector, paving the way for a strong role for other green fuels such as electricity and hydrogen One of the provisions of the Renewable Energy Directive (2009/28/EC) requires all Member States of the European Union to ensure that renewable energy sources account for at le