How to travel sustainable? A question that has been on our minds for a long time.. Planes, trains, cars we never know what to choose. Dave went on the longest train trip in the world. 168 hours in the Transberian express train through Russia with grandma's, a hot water machine and an outside temperature of -25 in Siberia. Good time to do some proper thinking to find an answer. At the end of it Dave made 3 commitments for the future :)