<i>But what about black swan events? Say a 9.0 earthquake and tsunami on the cost demolishing some old nuclear reactors? Might nuclear radiation be so severe that it would wipe off life from the planet, or at least fry thousands, and eliminate its considerable lead in saftey? It is possible, but not likely.</i><p>Which is kind of amusing, if you take out the middle of the paragraph:<p><i>But what about black swan events? ... It is possible, but not likely.</i>