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Passive systems of mitigation have actually been shown to be capable of reducing indoor radon degrees by more than 50%. When radon air flow followers are added radon levels can even be reduced further. The threat of lung cancer cells boosts by 16% per 100 Bq/m3 increase in long period of time ordinary radon concentration. The dose-response relationship is direct-- for instance, the danger of lung cancer cells increases proportionally with boosting radon direct exposure. The lower the radon concentration in a home, the lower the threat of lung cancer as there is no recognized threshold below which radon exposure carries no danger.
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