[aigel]

Radon comes out of the ground naturally, nothing to do with man-made stuff. IMHO any radiation you can avoid, GO FOR IT. There are limits set by government entities, but everyone's body reacts different. Your trigger point to setting off something bad may be a lot lower than the average guy, so don't roll the dice. IMHO there is no "safe" level of radiation and every time you can reduce your "background radiation" exposure, you should go do it.

HTH,

G