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A book review on the latest Weinersmith creation. It’s true, there is so much we don’t know.
Just throwing this out there on this forum because missing technology is the problem that kills the dream of Mars, according to the authors.
NASAs rover has already successfully tested a carbon dioxide to oxygen conversion system, MOXIE.
https://mars.nasa.gov/mars2020/spacecraft/instruments/moxie/
https://www.nasa.gov/news-release/nasas-perseverance-mars-rover-extracts-first-oxygen-from-red-planet/
If they can do it on a rover, it’s pretty trivial to scale that up to an industrial scale.
In the first link you provided, NASA themselves say we’d need a 25,000 watt power plant to scale that up. That’s not trivial.
Again, what the authors are pointing out is that space colonization is probably scientifically possible, but will take a lot of research and then investment. MOXIE is a great tech demo, but its not a solution by itself.