Pictures above: That is natural living, feet on contact with Earth. The bioelectric null is given by Earth. The bioelectric life process is stabilized and naturally performing. The cow above enjoys the natural bioelectric null stabilization as well. Any electron removed from a living organism is in light speed replaced by Earth. No natural, or man made electric smog has any impact on their life.
In the airplane it is even worse. In 10000 meters up in the air, a normal altitude for passenger airplanes, the surrounding atmosphere has a natural charge of about 100'000 Volts. Imagine how a passengers life process is reacting by such a bioelectric stabilization rise. It is a fact that pilots tend to suffer cancer in relative early age.
In early times all our communications were built with analogue technology. We remember the horrible pictures on television we needed to accept. We remember the crackling on the radio and telephone conversations, everything full of side noises. All such analogue driven electronic circuits needed the Earth wire, the zero voltage base to stabilize the circuit for best performance, to avoid distortions as good as possible. Not to stabilize a circuit was cursed, absolutely out of question! The human bioelectric life process is analogous and a missing zero stabilization causes "distortions" leading to health havoc!
For modern communication systems came the big change, the age of digital electronic circuits, digital communication. To day with the digital systems everything works perfect, communication without any side noises. Television most perfect pictures. Radio absolutely clear. No Earth wire for zero stabilization is needed with this new kind of electronic system.
Now, what is the difference between the horrible and the perfect electronic communication. Simply explained, the old one is an electronic systems with a continuously variable wave. The communication was bound on the purity of the wave. Natural and man made electrostatic and electromagnetic interference changed this wave that causes distortions in sound and picture.
The digital communication system works differently. Simple explained, digit means finger, the system works with fingers. Electrostatic, or electromagnetic interference might shorten a finger, but it is still a finger and that is what matters. To day with digital communication everything works perfect and without the invention of digital electronics the modern mobile phone communication would not exist.
Let's not forget: The human bioelectric life process is an analogue driven system and any natural or man made interference causes side effects if the bioelectric null is missing.
Animal life evolved on absolute physical contact to Earth. Our ancestors walked with naked feet on Earth contact and were sleeping on Earth contact. This Earth contact is absolutely electrically neutral, zero voltage, and that offers the stabilization of the human analogue bioelectrical life process.
A distorted immune system, a immune system without bioelectric null stabilization has its weaknesses. Beside other illness, cancer needs to be watched and nipped in the bud as soon it wants to take over. The human body, such a sophisticated arrangement of nearly all the chemical minerals, if out of control, is the perfect base for an evolutionary attack. Cancer the unseeded attacker is waiting in every human body for the moment of the immunity's failure.