The train is under way. We are welcomed by Jean-Pierre Loubinoux, UIC Director General and then it is straight into the first conference - Updating Climate Science.
Professor Jean-Pascal van Ypersele of IPPC, Achim Steiner form UNEP and James P. Leape from WWF international give quick summaries of the science and then the questions begin.
Soon the questions move beyond science into politics and policy. There is an intensity and purpose to the questions. Nobody is pulling in punches, but there is a sense that people want to create a positive narrative, a story about how we can deal with this situation.
In the next conference - Rail and Climate Protection - we hear the answers to how our transport system can become sustainable with many examples of train technological best practice.
With transport producing around 25% of all emissions it is vital that are transport system evolves.