In the case of North Korea it is likely the raw material they lack. They are a small and insular country, and may not have any significant indigenous reserves o

In the case of North Korea it is likely the raw material they lack. They are a small and insular country, and may not have any significant indigenous reserves of uranium ore. This is a very good thing, and unfortunately one that sea-water extraction technology--which is otherwise a very good thing because it makes natural uranium a renewable resource--may eventually have an effect on.