HONEYCOMB
Atmospheric Composition The atmosphere aboard the Honeycomb Space Settlement is a standard, Earth-like mixture of nitrogen (79% ) and oxygen (21% ) [9]. The main advantage that the mix has over a pure oxygen atmosphere is the increased safety (especially against fire, which can be incredibly problematic, as shown by the Apollo 1 mission). However, the spacecraft’s life support systems can always reduce the nitrogen levels while increasing oxygen, in order to make the settlement lighter (by removing the need for a large number of nitrogen tanks) and to minimize the effects of decompression sickness.
Fig 5.4 Diagram of the life support system aboard the Honeycomb Space Settlement[10][11]
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