Safety problems associated with the use of gaseous hydrogen as an energy carrier are compared with other combustibles (methane, propane). On the basis of a simple one-dimensional model, the whole combustion process can be simulated. Critical burning and flame velocities and the critical strength for incident shock waves for transition from deflagration-to-detonation are calculated. Flame inhibition methods are briefly discussed. The envisaged large-scale introduction of hydrogen as an energy carrier into energy supply systems raises questions concerning specific risks and necessary safety measures in a much greater extent and significance as compared to the exclusive industrial utilization of hydrogen.