The natural radioactive element Uranium is present everywhere in rocks and soil. It is the radioactive decay of Uranium that produces Radium, which in turn decays to Radon, a radioactive colourless, tasteless and odourless inert gas. As it is a gas, it can move easily through bedrock and soil and escape into the outdoor air or seep into a home or building. Radon may also be present in water. Radon moves from the ground into the outdoor air where it then rapidly dilutes to low concentrations and is not a significant health concern. It becomes a health concern when it can build up to significant levels indoors due to the lack of fresh air dilution. The only way to know if Radon levels are elevated or not within your home is to test for it.
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