I agree with you, Dane, on the part about "could never be quantified". Your total lack of evidence or a rationale for this claim is reason enough to doubt it, what more needs to be said?
Here, Wigington makes a statement about "bioavailable" aluminum, but has he actually ever done any work to quantify the amount of bioavailable aluminum he claims is in every drop of rain?
The answer is- NO!
First, let's look at his claims about aluminum in rain. He presents as evidence the following lab test results which show an average of 489:
However, in 1967 and 1973, average aluminum levels in rain were found to be about the same:
The studies above show that perfectly ordinary levels of aluminum are being found in rain, but do any of these tests determine the bioavialability of the aluminum found? The answer is- NO! Let me explain.
Bioavailability is defined as
"A measure of the amount of a substance that is actually absorbed from a given dose."
The bioavailability can only be measured by testing what has
actually been absorbed by a plant or animal, and Wigington & Co. have not done so. Their analysis only tested for the total elemental concentration of aluminum in the rainwater. They found perfectly ordinary levels known for forty years and more, levels derived from suspended soil dust in the atmosphere, since about 8% of soil dust is aluminum.
Let me discuss how aluminum becomes bioavailable. Elemental aluminum is never found in nature, since it reacts with oxygen in the air to form the compound aluminum oxide. Aluminum oxide in water is only available for absorption if it is soluble which requires ph values below 5.3 or above 9:

Even within that ph range, most aluminum oxide remains insoluble because it is combined with oxygen to form insoluble minerals. Within the lattice of this mineral, the aluminum is tightly bound between atoms of oxygen, and this bond protects it from release:
Thus, it is shown that Wigington has only determined perfectly ordinary levels of aluminum in rain, and has never determined any quantification of bioavailability at all.
Of interest here is the fact that the organization to which Dane Wigington belongs
actually suggests consuming aluminum oxide on a daily basis:
http://metabunk.org/threads/241-Anth...ull=1#post7707
They know.
They know that aluminum oxide is a harmless substance.
But what of his claim that Monsanto is "engaged in the production of "aluminum resistant" seeds"?
Aluminum resistant seeds are indeed being developed, because many tropical soils are low enough in ph for the natural aluminum found in those soils to become soluble:
http://metabunk.org/threads/341-Debu...and-Chemtrails
However, Monsanto is not engaged in producing such seeds, no seed company is offering such seeds, and the only patent for such seeds is held by the Brazilian and US governments, not by Monsanto:
http://www.freepatentsonline.com/7582809.html
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