"k" == kontiki writes:

k If you dug down into any number of 50 year-old (or greater)
k backyards you's probably be shocked at the concotion of
k contaminats to be found. I would bet any money that the
k amounts of contaminats from various airports are but a blip in
k the noise level compared to all the contaminats from homes and
k businesses across the country.

k But why inject logic in to the maelstrom.

"Why inject logic"...we don't know, since you didn't inject logic, but
rather fairly wild, unsubstantiated speculation and conjecture.