Nuwa is a proposal for a large-scale permanent Martian settlement.
What is the planned atmospheric composition of Nuwa city's air? Will it be 15psi Oxygen/nitrogen, and trace gases or low partial pressure oxygen.
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According to the Nuwa Concept Technical Report, the habitat atmosphere will be 30% oxygen by volume at 75kPa (~11 psi), with the balance being nitrogen, argon, and CO2. Agricultural modules will be kept at lower pressure with a CO2-rich mix.