A healthy person that uses medical oxygen to perform their job on a daily basis should expect to eventually become a sick person.

Working on the summit of Mauna Kea was comparable to working on the hospital pulmonary ward with sick people sucking on oxygen cylinders.

The most deformed AC voltage sine wave that I have seen in my career was at a high altitude astronomical observatory where I worked for almost three years. I eventually became so sick sitting next to the electrical room daily that I had no option but to leave.

There is a lot of willful incompetence in high altitude astronomy that is in the process of coming to light.

High altitude astronomy is a strange world of oxygen starvation, sleep deprivation and radiation sickness.

Astronomy staff that routinely discharged industrial gas into the indoor environment at high altitudes did not wear oxygen deficiency monitors or protective breathing respirators.