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**antiggill** · 04-30-2012, 08:51 PM

what makes you think that resources will be so 'depleated' here that we'll need to source them off world?

I mean, the Earth is pretty much a giant metal ball?

Because cost ramps up with both declining grade and also the remoteness or depth of the orebody. By the same token, the unit cost of carting payloads in space will decrease slowly over the coming decades. What makes you think that the two might never meet?

I'm not talking this century but to say it might never happen is a bit odd imo.

04-30-2012, 08:51 PM	#31
antiggill Join Date Oct 2005 Posts 425 Senior Member	what makes you think that resources will be so 'depleated' here that we'll need to source them off world? I mean, the Earth is pretty much a giant metal ball? Because cost ramps up with both declining grade and also the remoteness or depth of the orebody. By the same token, the unit cost of carting payloads in space will decrease slowly over the coming decades. What makes you think that the two might never meet? I'm not talking this century but to say it might never happen is a bit odd imo.
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