I pretty much agree with your assessment. Additionally, I'd point out that there is support for excessive oxygen & strong electromagnetic energies.
Remember, people no longer live on the surface, but in high altitudes where oxygen should be thinner. However, everyone seems to be relatively fine. So maybe, one of the reasons why people have left the surface, is because there's just too much of an abundance of oxygen down at the surface.
Also, the crystals seem more of a focus/battery for etheric energies, from my perspective. They basically pull energies from the air, and convert them to energy that can be used. So that's a point for strong electromagnetics.
Just my two cents.