This strategy features in the framework of Agenda 21 as formulated at UNCED (Rio de Janeiro, 1992), now coordinated by the United Nations Commission on Sustainable Development and implemented through national and local authorities. Agenda 21 recommends developing feasibility studies and operational planning related to major forest activities.[Conservation of the Forest Ecosystem Studies] are produced by IUCN to examine the status of forest ecosystems in nine African countries and provide guidance on how these systems should be managed for sustained use and economic development.