Furthermore, it would take a combination of extreme events to make things dangerous in Tokyo (nuclear re-criticality, steam explosion) etc all of which are being rendered less and less likely as time passes and the heat decay process progresses.

FORBES: Fukushima Cleanup Recap

That process of decay would result in the particles losing substantial amounts of energy.

FORBES: More Evidence Against Faster Than Light Neutrinos

Another is for a wiser attitude to the process of decay and the fact of death.

ECONOMIST: Dust and decay

These skills decay without constant refreshers and over-compensation with process and systems.

FORBES: Level 5 Time Management: Beyond Stephen R. Covey and Ben Franklin