GM Europe's Manager Hydrogen & Fuel Cell Deployment Strategy, Dr. Lars Peter Thiesen, introduces the new GM Hydrogen4 at the 2007 Frankfurt Motor Show. With the HydroGen4, GM presents the fourth generation of its fuel cell technology. From mid-2008, a total of ten HydroGen4 vehicles will take part in day-to-day testing within the framework of the Clean Energy Partnership (CEP) in Berlin.