Experts are raising questions about the legitimacy of North Korea's estimated reserves of rare earths, used from computers to cars and defense missiles.
They'll hand back more than 175,000 hectares of prime conservation land they have held since 1971 to West Australia, ditching plans to build a bauxite mine and an alumina refinery in the area.
The move may be the first of many more competitive deals by producers in the potash market, which has historically operated with large joint ventures controlling prices.