Americans are exposed to about 0.3 rem (3 mSv) each year from natural sources, such as the sun. Potentially, exposure to any type of radiation can increase cancer risk, with higher exposure increasing the risk, Bouville said.
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Nuclear hazards are threat posed by the invisible and odourless contamination of the environment by the presence of radioactive materials such as radio-nuclides in air water or soil. These radio-nuclides emit high energy particles (alpha and beta rays) and electromagnetic radiations (gamma rays).
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Americans are exposed to about 0.3 rem (3 mSv) each year from natural sources, such as the sun. Potentially, exposure to any type of radiation can increase cancer risk, with higher exposure increasing the risk, Bouville said.