Hydrogen cars are not dangerous. After years of using it in transport, no hydrogen-specific risks have been identified. On the contrary, hydrogen has some advantages compared to conventional fuels: primarily because it is 14 times lighter than air. Unlike conventional fuels, no immediate fire load forms under the vehicle in the event of a leak, for example, because the hydrogen rises steeply and dissipates very quickly in the ambient air. In addition, all hydrogen-carrying components in the Toyota Mirai are located outside the passenger compartment. Furthermore, the Mirai’s sensors detect escaping hydrogen and close the safety valves if necessary.