EPA life time safety and security standards for carcinogens are developed based on a 1 in 100,000 risk of fatality. A lot of scientists concur that the danger of death for radon at 4 p Ci/L is approximately 1 in 100. At the 4 p Ci/L EPA ra…

The best threat of radon exposure occurs in structures that are airtight, insufficiently aerated, and also have foundation leaks that allow air from the soil into cellars and residence spaces. WHO provided in 2009 a suggested reference lev…