actually, sitting next to a stone wall will produce more harmful radiation to the body than living within 1 mile of a nuke plant. Everything has dangers. The body has a tolerance for radiation. Exceeding the tolerance is bad.
That depends on the exact stone used and the specific nuclear plant of course And now we are mixing up completely different kinds of radiation here.
After viewing The Great Global Warming Swindle, I am begining to believe that while there is a climate change, co2 may not be the main culptrit. Here is site that claims that mobiles do pose a significant threat : http://www.psrast.org/mobileng/mobilstarteng.htm