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Do you know how they keep the hydrogen cold? What if a car is sitting for a long time without being driven? Liquid hydrogen will boil at -252 degrees Celcius. Wikipedia says "Typically it will evaporate at a rate of 1% per day." That is with insulated containers.
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Now if thou would'st
When all have given him o'er
From death to life
Thou might'st him yet recover
-- Michael Drayton 1562 - 1631
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