Easy systems of reduction have been shown to be efficient in lowering indoor radon degrees by greater than 50%. When radon air flow fans are included radon levels can also be lowered better. The threat of lung cancer cells rises by 16% per 100 Bq/m3 boost in long period of time average radon concentration. The dose-response connection is straight-- for instance, the risk of lung cancer cells boosts proportionally with boosting radon exposure. The reduced the radon concentration in a home, the lower the risk of lung cancer cells as there is no known limit below which radon exposure lugs no danger.