But once the Infrastructure is in place the cost drops a lot. Take space elevators and mass drivers for example one expensive piece of equipment makes everything down the line a lot cheaper (dollars and cents cheaper). The days of the rocket are over I just wish NASA and the ESA would realize that.
Making hydrogen fuel on Earth will fuel humanity for what a century or two? Going out and getting it will fuel it forever. Someone was complaining about the short sightedness of energy policy well this is about as long term as you can get without quoting Prof. Dyson.
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