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Yes, the replacement can be physically done on a global scale. Bear in mind that the energy inputs of the construction is part of the EROI number, so if declining energy abundance or profligacy (whichever comes first) pushes up the relative cost of the building, it also increases the value of the output.

I've been accused of being a Marxist, yet while Harpo's my favourite, it's Groucho I'm always quoting. Odd, that.
by BruceMcF (agila61 at netscape dot net) on Thu Jul 25th, 2013 at 01:18:00 PM EST
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