If hydrocarbons are renewable - then is "Peak Oil" a fraud?

[CerberusIV]

Then again CO2 is relatively inert, chemically speaking, and carbon locked into CO2 and held under pressure in molten rock isn't really available to make anything else.

[Az]

My question isn't where do they get Carbon - but where do they get hydrogen. I am not really familiar with chemistry of the depths.

[Urban Ranger]

Methane?

che - if CO2 is involved, you need to remove the oxygen somehow.

[The Mad Monk]

We know there is elemental carbon deep in the planet, or at least a process for generating it -- diamond and graphite deposits demonstrate that much. We also know that hydrogen is available, at least in the form of water -- most magmas have at least some water, so it isn't exactly rare.

I don't know if there is a way to make them react, but I won't discount the possibility.

[Az]

"at least some water" <<< carbon deposits.

[The Mad Monk]

???

You wanted to know where the hydrogen was, I provided a source.

[Urban Ranger]

If you mix carbon and water you'll still get carbon and water.

[DaShi]

But that assumes that carbon and water are the only elements involved. Not everyone thinks in such simple terms, you know.