On 1/7/07, peter green <plugwash@p10link.net> wrote:
>
> > I'm not a chem engineer, but a friend that /is/ tells me fossil fuels
> > require four times the yield of energy to recover it from the earth
> > and process it.

> then ask him where the hell that energy comes from.
>
> I'm not saying that all fossil fuel recovery that happens is positive in
> terms of usefull energy output to usefull energy input but on average they
> must be otherwise fossil fuels could not be the dominant contributor to our
> supply of usefull energy.

I'm pretty sure it comes from the oil. 5 barrels -> 1 barrel.

Tsu
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