Radon as a risk factor of lung cancer

Radon is the second leading cause of lung cancer after smoking. Indoor radon concentration poses a significant and potentially subject to the prevention risk factor of lung cancer development. The paper present the history of studies assessing occupational and indoor radon exposure and an impact of international organizations for raise public and political awareness about the consequences of long term exposure to residential radon, resulting in the European Directive 2013/59/Euratom of 5 December 2013 laying down basic safety standards for protection against the dangers arising from exposure to ionising radiation.