hi thank you for your invitation to join your group
here is part of an exiting text by a Japanese group.. i hope you find
it interesting.
>>>>>>2. Deficiency of the Magnetic Field acting on the human body

The earth's magnetic field is of course a stationary magnetic field
working constantly on the human body. For this reason, I wish to
discuss here whether this field is actually in a deficient state or
not. Kawai(40) stated that the strength of the earth's field has
decreased a total of 50% during the last 500 years, decreasing 5%
over the past 100 years. Furthermore, it is said(41) that the total
moment of the earth's magnetic field has been decreasing at the rate
of 0.05% per year. Along these lines, Rikitake(42) also states that
the magnetic moment of the earth is decreasing quite rapidly, the
rate of decrease having reached about 5% per one hundred years. He
maintains that if this continues the earth's magnetic field will
eventually reach zero in 200 years. Along with this decrease, the
angles of the earth's magnetic field are also said to be changing.

It seems certain we can assume that the earth's magnetic field is
decreasing in strength, and we can well imagine that this could be
the cause of disorder in the human body.

Furthermore, we also consider that there are other factors as well,
which could play a part in decreasing the effect of the earth's field
acting on the human body.

Living or working in steel frame or steel structure buildings is one
of these. Iron is several hundred to several thousand times more
permeable than air(43), and so can absorb a large part of the
magnetic lines of the earth's field thus sheltering people from such.
Automobiles, electric trains, and ships are, to some extent, also
sheltered places, the latter being especially so.

To confirm this point, it is necessary to actually measure the field
strength on the spot, and we are at the moment preparing to do this.
However, the actual process of measurement seems to be very difficult
(42).

As the human race has long been under the influence of the earth's
magnetic field I believe, as I mentioned before(7), that any change
in this field could cause disorder in the human body. Kawai's book
(40) is subtitled "The Earth's Magnetic Field Controls the Weather",
and if this is really the situation, the human body will be
influenced by this change in the weather. This can be shown as
follows: Change in the earth's magnetic field leads to a change in
the weather which leads to an influence on the human body and
consequent disorder of some kind.

However, even if the disorder in the human body occurs along these
lines, it does not fall into the category we claim to be the Magnetic
Field Deficiency Syndrome. The reason for this is that such a
disorder would be caused indirectly by the change in the weather, and
there would be no change in such a disorder which could be gained by
applying a magnetic field directly to the human body.

We are left with the question of how magnetic fields (including the
earth's field) directly affect the human body, and I wish to take
this up