Tank designed not to explode, but allows for hydrogen to just burn. It burns off very fast and is out in seconds. Its been approved for street use buy state and federal already. California has approved it. they are the tuffist to get things passed.
the Hindenburg's Hydrogen did not explode it burned after some thing else exploded or Lighting strike, unknown to date. hydrogen in impregnated canvas bags could not explode. Old movies of the disaster shows the burning, not exploding. Check your history.
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