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About 80% of human exposure to radiation comes from natural sources, including outer space (cosmic rays), soil (terrestrial radiation), and radon gas. Cosmic rays contribute approximately 8% of this exposure, while radon gas accounts for about 55%. The remaining exposure comes from terrestrial sources and the natural radioactivity present in the human body itself. Overall, these natural sources contribute significantly to the background radiation that humans are exposed to.

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1mo ago

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