Sorry to disappoint but Hydrogen can easily be produced without fossil
fuel .... water is typically used (H2O) either catalyse or electrolyse
off the oxygen, and you have clean Hydrogen. (or Plasma arc process of
Kværner Engineering)
I know that industrial processes for Hydrogen then recirculate the
Oxygen to produce the energy for the process.

Presently there are also processes for bulk steam reforming of natural
gas or methane

OK it can be argued that you are probably using fossil fuel to produce
the electricity for any electrolytic process - but there are
workarounds for that.

If you want more details look at:
http://www.hyweb.de/Knowledge/w-i-energiew-eng3.html

They discuss a hugely efficient process (almost 100%) with 1005 usable
output products.