For transport, a major contributor to greenhouse gases, the challenge to reduce emissions is immense, particularly as most forecasts see transport activity doubling or tripling in the next 30 years. Fortunately, governments in the OECD area (which is where most greenhouse gases come from) are starting to act, though much more needs to be done. That is why the first International Transport Forum, to be held in Leipzig, Germany, from 28-30 May 2008, will be devoted to the theme