Ken Fabian
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That was in reference to the difference between bases and colonies - not so clear with a quote of previous quote. I think the Earth economy could manage to build and supply a Mars or moon base - at great expense. Whilst some in-situ resources can help I don't think a local economy - a colony - can supply itself, even feed itself. Supplement the imported supplies maybe, like some fresh greens under lights in Antarctica.DaveC426913 said:But are you accounting for the fabulously expensive transport costs?
Up out of one gravity well, across 50 million miles and down into another?
The avoided transport costs still aren't enough advantage when it takes such a massive pre-investment to build the infrastructure for growing food.
Copper? I was thinking motors for pumps and wiring for lighting. Lots of pumps, lots of lights. But I was also thinking it is premature to attempt a permanent settlement in expectation it has the potential to become self sufficient later without knowing the essential resources are there. Not only available on Mars (or moon) but nearby. Maybe aluminium could substitute for copper but is that present in concentrated ore bodies?