14th. Toxicity of radon to the body. Radon is harmful to lung tissue exposure to radiation from radon contact for over 20-30 years to cause cancer of the lungs.
14. toxic gas radon per body. Radon gas is harmful to lung tissue. To receive Kammantaphap substances and radiation from radon gas consecutively for over 20-30 years will cause a cancer to the lungs.
14. Of the toxic gas radon gas radon is a health hazard in the lung tissue for the substances radioactivity from radon gas. Contact for more than 20 - 30 years old will cause cancer in the lungs.