What do you think of this?
http://news.uns.purdue.edu/x/2007a/070515WoodallHydrogen.html
Sammie

>Good luck finding a hyrdogen powered car on your road in the next 10 years...
>
>+++ Rick ---
>
>>> these blasts can level large areas upwards of 1Km blast radius.
>>
>>I'll have to remember that if I ever see a hydrogen powered car on fire!!
>>
>>><snip> All that gas under pressure? What about accidents? Kaboom!
>>>
>>>Hydrogen is pretty safe, if the pressure vessel is punctured it vents to atmosphere and being lighter than air leaves the area quickly, whereas petrol vapour being heavier than air pools on the ground waiting for an ignition source.
>>>
>>>The only problem with hydrogen is confined spaces where it can mix to the right proportions and cause a major explosion.
>>>
>>>Also with any liquified gas like LPG or Hydrogen you have the risk of a BLEVE (Boiling Liquid Expanding Vapour Explosion) if you have flame inpingment on the pressure vessel which causes the vessel to fail. Another name for BLEVE is "Blast Leveling Everything Very Effectively", these blasts can level large areas upwards of 1Km blast radius.