Prevention lung cancer.
The research indicated that, the indoor environment pollution already became one of main causes which the lung cancer arose. The domestic and foreign quantitative investigation already confirmed that, indoor environment pollution two big origins--smoking and the radioactive substance Radon and its the subfield was induces the lung cancer the primary dangerous factor. Because 90% Radon and its the subfield is emits through the crack, therefore, the floor is lower, Radon and its the subfield thickly goes past high. With for a long time compares in Radon and its in the subfield low exposition room person, contracts the lung cancer in the high exposed room person the risk to be high 30%.
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