[sbaiddn]

I understand half life. My point moisture currents can spread water soluble things very far very quickly.

Think of it this way, what happens if there's a catastrophic sodium leak? The winds carry it far and the Na gets into everything because it will be diluted into the wind's moisture. Won't you breath the radioactive Na from the air's moisture?

[meepmorp]

The point is that the leaked material stops being dangerous before it can get very far.

[flangola7]

Two days of strong winds and storms and you've just dumped sieverts on most of the central US and Canada.