In article , Tom Sixkiller wrote:
Hydrogen either must be obtained by breaking chemical bonds in oil
(therefore using oil), or breaking the chemical bonds in water (with,
for example, electrolysis). Breaking chemical bonds takes energy and
resources. There just isn't a bunch of hydrogen floating around for us
to extract - the hydrogen is all bonded to some other atom (bummer).

How much hyrogen is can be obtained from petroleum relative to the energy
required for fueld cells?

It doesn't matter how much - energy will be lost in the process. If you
do make a more efficient system utilizing a fuel cell (which you should
be able to - for a vehicle, fuel cell + battery + regenerative braking
should be much more efficient than today's internal combustion engines +
friction brakes) you are still using a resource that is very definitely
finite. It still doesn't change the laws of thermodynamics (no free
lunch) and our burgeoning population is still dependent on oil to feed
itself.

All you've offered is vague insults, and you still haven't explained why
my belief in the laws of thermodynamics is somehow "misleading" or
"inaccurate".

--
Dylan Smith, Castletown, Isle of Man
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"Maintain thine airspeed, lest the ground come up and smite thee"