The only known health risk associated from exposure to Radon is an increased risk of developing lung cancer. The risk increases considerably from higher concentrations of Radon, length of time to exposure, and smoking habits.
Health Canada estimates a non-smoker that is exposed to elevated levels of Radon over a lifetime has a 1 in 20 chance of contracting lung cancer. If a smoker was exposed to the same levels as the non-smoker over a lifetime, the risk increases to a 1 in 3 chance of contracting lung cancer.
Exposure to Radon does not cause other diseases or respiratory conditions nor will it produce symptoms such as coughing or headaches.
The estimated risk of lung cancer from Radon exposure was originally based on exposures to high concentrations of Radon associated in Uranium mines. Recent residential studies have now confirmed that exposure to lower levels of Radon usually found in homes also carries a risk of lung cancer.
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