[ExI] energy modelling

[Keith Henson]

I commented

http://www.theoildrum.com/node/7924#comment-806349

Keith

2011/5/25 Alfio Puglisi <alfio.puglisi at gmail.com>:
> After all the threads about solar energy, fracking and so on, some could
> find interesting this introductory bird's-eye view about systems, resources
> and thermodynamics:
> http://www.theoildrum.com/node/7924
> Alfio
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