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For metal specifically this technology will be vital: https://www.bostonmetal.com/ https://www.bostonmetal.com/ They figured out how to refine iron out of iron ore without all the usual steps. We don't have coal on Mars. Everything need to be driven by electrochemistry. Check out: - https://www.youtube.com/watch?v=-pYNzxorJs0 https://www.youtube.com/watch?v=-pYNzxorJs0 - https://www.youtube.com/watch?v=pg5M5WjGx5M https://www.youtube.com/watch?v=pg5M5WjGx5M