Commenting in particular about the concern with aluminium "chemtrails". 
To quote from Wikipedia:-
"Aluminium salts are remarkably nontoxic". 
Aluminium is the third most common element in the earth's crust after silicon and oxygen, and exposure to aluminium from natural dust  in the air, drinking water, medication and food would exceed any possible contribution from "chemtrails" by several orders of magnitude. Even in careful chemical analysis, it is very difficult to avoid aluminium contamination, leading, for example, to the now discounted relation of Alzheimer's disease to aluminium cookware.
John
				
			 
			
		 
			
				
			
			
				John
JDNSW
1986 110 County 3.9 diesel
1970 2a 109 2.25 petrol
			
			
		 
	
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