 The Strategy was followed in 1982 by the "World Charter for Nature", which was adopted by the United Nations General Assembly, after preparation by IUCN.In 1980, IUCN and WWF moved into shared new offices in Gland, Switzerland.This marked a phase of closer cooperation with WWF, but the close ties between IUCN and WWF were severed in 1985 when WWF decided to take control of its own field projects, which so far had been run by IUCN.