they are just as dangerous as regular cars. when the combustion engine was made, the first cars which also ran on a highly volatile liquid, gasoline, were thought to be too dangerous. the thought of a cart powered by explosions was proposterous. hydrogen is just the same. the only problems really arecost, lack of fueling stations (the chicken or the egg problem), problem of maintaining hydrogen in liquid state.
they are just as dangerous as regular cars. when the combustion engine was made, the first cars which also ran on a highly volatile liquid, gasoline, were thought to be too dangerous. the thought of a cart powered by explosions was proposterous. hydrogen is just the same. the only problems really arecost, lack of fueling stations (the chicken or the egg problem), problem of maintaining hydrogen in liquid state.