Reply #150: Just to be a little more graphic about this, this means that if the Tc

[NNadir]

migrated 100 meters, roughly the length of a football field, only 5.5 X 10(-15) th of it would remain, or 5.5 quadrillionths of it. This means that a gram of the material that started migrating today and made across the football field ten million years from now would be responsible for 2 or 3 nuclear decays per day! A typical room anywhere on this planet on the other hand has, in every liter of air, more than 130 decays per minute from radon gas.

http://hyperphysics.phy-astr.gsu.edu/hbase/nuclear/radon.html#c4

This should give some insight as to how ridiculous and irrational some of the nuclear fear mongers can be. They want you to believe that somehow all of this radioactivity is going to defy the laws of physics and get into your body just by virtue of its existence but in fact, most of it isn't going anywhere near you.