But I'm saying that we should develop that technology. The first step would be a successful experiment along the lines of Biosphere 2. Once you can build a sustainable facility like that, plop a few down on Mars.

Bam. Permanent habitation.

From there, continue to develop infrastructure and move toward a self-sustaining economy. And, of course, continue work on technology that would allow for terraforming.

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Quaeso quousque humi defixa tua mens erit? Nonne aspicis, quae in templa veneris?