[ RadSafe ] Natural gamma rays linked to childhood leukaemia

[ROY HERREN]

http://www.ox.ac.uk/media/news_stories/2012/120612.html
  Natural gamma rays linked to childhood leukaemia
 
A small but statistically significant link between risk of childhood leukaemia 
and the gamma rays we are all exposed to from our natural environment has been 
detected in a very large study led by Oxford University researchers.