Hydrogen is not an alternative in the short term, but may prove viable together with fuel cells some time beyond 2020.
Powertrains that comprise a fuel cell and an electric motor could be an interesting alternative – in the very long term. A hydrogen fuel cell is reasonably efficient in heavy-duty transport, but no method to transport sufficient amounts of hydrogen gas on a vehicle currently exists. Also, hydrogen must be produced from renewable raw materials, a technology which is not viable at present. Scania has participated in a European project to develop a concept fuel cell bus.