Global Environment Outlook (GEO) is a series of reports on the environment issued periodically by the United Nations Environmental Programme (UNEP). The GEO project was initiated in response to the environmental reporting requirements of UN Agenda 21 and to a UNEP Governing Council decision of May 1995 which requested the production of a new comprehensive global state of the environment report.
Five GEO reports have been published to date: GEO-1 in 1997; GEO-2000 in 1999; GEO-3 in 2002; GEO-4 in 2007; and GEO-5 in 2012.
The coordinated global network of collaborating centres (CCs) is at the core of the GEO process. These centres have played an increasingly active role in preparing GEO reports. Regional centres are now responsible for almost all the regional inputs, combining integrated assessment with environmental reporting. Other institutions provide specialized expertise on cross-cutting or thematic issues.
Working groups provide advice and support to the GEO process, particularly on integrated assessment methodologies and process planning.
Other United Nations agencies contribute to the GEO process, mainly by providing substantive data and information on the many environmental and related issues that fall under their individual mandates. They also participate in the review process.
The GEO reports are produced using a participatory and consultative approach. Input is solicited from a wide range of sources throughout the world, including the collaborating centre network, United Nations organizations and independent experts. Working together with the GEO Coordinating Team in Nairobi and the regions, the CCs research, write and review major parts of the report. During the preparation of the report, UNEP organizes consultations inviting policy makers and other stakeholders to review and comment on draft materials. Drafts also undergo extensive peer review. This iterative process is designed to ensure that the contents are scientifically accurate and policy relevant to users in different parts of the world and with different environmental information needs.