Innovations Report: New UK legislation coming into effect on 15 April 2008 – the Renewable Transport Fuel Obligation – will mean that biofuels must show significantly smaller carbon footprints than their petroleum-based cousins in order to keep their government subsidies. But governments of the UK, the EU, Germany and the US disagree seriously about biofuel footprints, and this could lead to confusion in the fuel markets, says Eric Johnson, editor of Environmental Impact Assessment Review, in an article …