> Permanent (self-sufficient) LEO human habitation doesn't make sense because there's no source of material there Whole books have been written on the raw mate

> Permanent (self-sufficient) LEO human habitation doesn't make sense because there's no source of material there Whole books have been written on the raw materials available in space, both from the moon and from Near Earth Objects.[] Mars is a bad idea that needs to go away before we lose the opportunity to perform the actual next step, which O'Neill and others mapped out decades ago. [] https://en.m.wikipedia.org/wiki/Mining_the_Sky https://en.m.wikipedia.org/wiki/Mining_the_Sky