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Re: Fuel Cells

If you use pure hydrogen as the fuel, the cell should last pretty much
indefinitely. If you use natural gas or other hydrocarbon based fuel, my
guess is that the electrodes will become contaminated eventually and the
cell will stop working.

TX, Mark, but this gives rise to my question re renewability: I am wiling
to stipulate that there is a infinite supply of O2 -- assuming that we stop
cutting down every tree in the galaxy -- but what is the renewable source
of H2???

Jim Green