Air
Settlers on Mars depend on artificial air for breathing, since the atmosphere is too thin and poisonous.
Low pressure effects
The human breathing works best at terrestrial sealevel with an air pressure of 1013 Hektopascal (hPa). The air pressure on the Mount Everest is only 340 hPa.
In such high altitudes of the terrestrial atmosphere the air pressure drops to dangerous values, resulting in acute mountain sickness (AMS) and high altitude pulmonary edema (HAPE).
Fire
Persons can live and work with less than 20% oxygen. The danger of fire is much lower with low oxygen air.
Open Issues
- What air pressure and ogygen level is required for persons to survive?
- What air pressure and ogygen level is required for persons to live and work?
