Radon is believed to cause an increased risk of lung cancer and it is therefore of interest to identify houses with high levels of indoor radon. It is important to know how many houses that have high levels and the location of these houses. Furthermore, it is of interest to know about low-radon houses where there is no cause for alarm. Radon and childhood cancer (June 2008)To read about the new study about radon and childhood cancer, please go to the Danish version of this page (click on the Danish flag).In Danish: Hvis du vil læse om den nye undersøgelse om radon og børnekræft, så skal du skifte til den danske udgave af denne side (klik på Dannebrog).