Mars colonization is a PR boondoggle and there is no resource constraint on earth. Flying indentured servants and aristocrats to Mars to live in a manufactured community, in a manufactured environment to be closer to far-away minerals, sir, is idiotic when considered for what it is.
There is absolutely nothing scalable or sustainable about it. When people can build a sustainable community in our own deserts maybe we can talk about a sustainable desert community millions of miles away from our homeland.
Next!