Comment by AlotOfReading
4 days ago
This exact same problem exists on mountains, which is why there are no permanent settlements above 5,100m. The Apollo pressure mentioned above (1/3rd atm) is roughly equivalent to an elevation of 8,500m, well into the "death zone" for a normal atmospheric mix.
Yes, I know about the death zone. But air pressure is significantly less in Denver, and many town are much higher.