Part 1
Radon is a naturally occurring radioactive gas released during the decay of torium and uranium, which are common elements found in variying amounts in rock, soil and water. Radon is also colorless, orderless and tasteless, making it undetectable to human senses. When radioactive elements such as radon start to decay, radiation is released. Products of radon decay like polonium-218 and polonium-214 emit alpha particles that are effective in damaging lung tissues. Research has established a causal relationship between alpha-emitters and lung cancer in humans..
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