Photo: Andy Duback/Greenpeace
With nuclear energy, uranium atoms split inside a reactor, and radiation heats water to its boiling point creating steam to spin a giant turbine. It all seems like ingenious, efficient, and clean energy production. So where's the mess? Now consider plutonium, a horribly carcinogenic and highly fissionable substance, radioactive for more than half a million years. If exposed to air, it will ignite. Like little pieces of confetti, very fine plutonium particles will disperse after ignition.