 Soros has also stated that "the euro has many unresolved problems" which "must not be allowed to destroy the European Union".He advocated replacing the notion of a multi-speed Europe by the aim of a "multi-track Europe" that would allow member states a wider variety of choices.In view of the possibility of a further increase of the number of refugees from Africa to Europe, Soros proposes that the European Union devise a "Marshall Plan for Africa" (see "Marshall Plan"), fostering education and employment in Africa in order to reduce emigration.