you repeat what you heard without understanding it. like a parrot.
From aircraft flight you get no internal emitters into your body.
some idiots like to "measure" radiation doses in what they call banana units; a foolish thing. bananas contain a lot of K40, a radioactive isotope of potassium, BUT the human content of it is homoeostatically regulated to the lowest possible concentration. co- evolution found this solution. we should not speculate that humankind will find an adequate solution for all the artificial radionuclides from nuclear power plants.
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