EarthNuclear energy: The plutonium problem The British government spends billions guarding its plutonium stockpile against terrorists. The best option for getting rid of it is deep burial – but where? Features
EarthNorth Korea nuclear threats: how worried should we be? Pyongyang says it will reopen a facility used to make weapons-grade plutonium and that US aggression will be countered with nuclear weapons ¿ìè¶ÌÊÓÆµ