The World Health Organization announced that they have established a new limit for indoor radon gas. The new maximum radon level is 2.7. This is a 32% reduction from the previously accepted "action level" of 4.0. http://www.mitigationsystem.com/releases/release/7166404/19723.htm
This new limit was prompted by a recent compilation of studies submitted by scientists throughout the World which conclusively point to radon as the second leading cause of lung cancer next to smoking. Based on the new 2.7 threshold, millions of homes will require repairs to reduce the levels of the gas.
Each year, hundreds of thousands of deaths throughout the World are caused by exposure to radon. This new plan of action by the World Health Organization will save millions of lives.
More than 100 scientists from 30 countries participated in the World Health Organization International Radon Project and assisted in the publishing of the Handbook on Indoor Radon which was released earlier this month. The book is a useful resource for concerned homeowners or anyone who wants to learn more about the toxic carcinogen known as radon. It outlines the years of research and the very conclusive findings that have triggered a push for stricter legislation and construction practices that will reduce the risk of lung cancer from indoor radon exposure. You can download a copy of the International Radon Handbook here: http://whqlibdoc.who.int/publications/2009/9789241547673_eng.pdf