Very high altitude astronomy only works by ignoring established biological science

Oxygen deprivation and supplemental oxygen are both bio-hazards for Mauna Kea workers

There is a time and place for electromagnetic shielding and I regard it as a last resort due to the long term biological problems that I have observed with it over the years in plant growth experiments.

The future of the next generation relies on astronomers obtaining a full understanding of
the rapidly changing human environmental conditions and the halting of biologically toxic corporate
government policies. The overloading of the electromagnetic environment is one of these disastrous
policies that must stop.

Plants can be affected by stray voltage and they may show stunted growth, deformed growth, or go dormant. In extreme cases they may die.

My memories of my time in high altitude astronomy indicate that there were no oxygen concentration monitors or alarms in the areas that liquid nitrogen was in use at the high altitude astronomical facilities where I had worked.