Current environmental policy and climate protection targets are increasingly regulating pollutant emissions from motor vehicles. Awareness among the population of the need for low-emission motor vehicles is also leading to the fact that alternative drives with new energy sources have been on the rise for some time. In addition to battery-electric vehicles, hydrogen-powered motor vehicles in particular can make an important contribution to the energy transition, as the emission of pollutants can be significantly reduced through the use of fuel cell vehicles in operation. In this e-Learning you can learn which different gases - in addition to hydrogen - are used in gas-powered motor vehicles, what their properties are, how the systems are constructed and what safety precautions are required when handling the vehicles. The e-Learning fulfils the requirements of DGUV FBHM-099 levels E and 1E as well as 1S and is the ideal quick entry for obtaining the technical knowledge and qualification for operating and working on vehicles with gas drive systems with a focus on hydrogen drive systems and hydrogen technology. To obtain level S, which is a prerequisite for level 1S, specific instruction on the vehicle in accordance with DGUV FBHM-099 is required.