Those listed below have contributed to the GEO Year Book 2003 in a variety of ways, as authors, reviewers, contributors and participants in meetings.

AFRICA
Abel Afouda, Département de Mathématiques, Université d'Abomey-Calavi, Bénin; Hans E. Beekman, South Africa; Mateete Bekunda, Faculty of Agriculture, Makerere University, Uganda; Ronald Chawatama, Southern African Research and Documentation Centre, Musokotwane Environment Resource Centre for Southern Africa, Zimbabwe; Fatma Denton, Programme Energie, Environnement et Développement du Tiers-Monde, Sénégal; Evans Kituyi, African Centre for Technology Studies, Kenya; Takawira Machimbidza, National University of Science and Technology, Zimbabwe; MaClaude Mafaiti, Southern African Development Community, Botswana; Clever Mafuta, Southern African Research and Documentation Centre, Musokotwane Environment Resource Centre for Southern Africa, Zimbabwe; Patricia Mamvoto, Southern African Research and Documentation Centre, Musokotwane Environment Resource Centre for Southern Africa, Zimbabwe; Leonissah Munjoma, Southern African Research and Documentation Centre, Musokotwane Environment Resource Centre for Southern Africa, Zimbabwe; R. D. Munro, XXCEL Africa Limited, Kenya; Admire Ndhlovu, Midlands State University, Zimbabwe; Eric Odada, Pan African Start Secretariat, Kenya National Academy of Sciences, University of Nairobi, Kenya; Youba Sokona, Programme Energie, Environnement et Développement du Tiers-Monde, Sénégal; Justice Utete, University of Zimbabwe, Zimbabwe.

ASIA and the PACIFIC
Sharad P. Adhikary, Himalayan Climate Centre, Nepal; Mozaharul Alam, Bangladesh Centre for Advanced Studies, Bangladesh; Suruchi Bhadwal, The Energy and Resources Institute, India; Preety Bhandari, The Energy and Resources Institute, India; Twinkle Chopra, United Nations Environment Programme Regional Resource Centre for Asia and the Pacific, Thailand; Michelle Finnemore, Gateway Antarctica, Centre for Antarctic Studies and Research, University of Canterbury, New Zealand; Goen Ho, Environmental Technology Centre, Murdoch University, Australia; Mylvakanam Iyngararasan, United Nations Environment Programme Regional Resource Centre for Asia and the Pacific, Thailand; Sunghan Jo, Department of Economics, Andong National University, Republic of Korea; K. Vijaya Lakshmi, Environment Systems Branch, Development Alternatives, India; Achira Leophairatana, United Nations Environment Programme Regional Resource Centre for Asia and the Pacific, Thailand; Vishal Narain, The Energy and Resources Institute, India; Shilpa Nischal, The Energy and Resources Institute, India; Purna Chandra Lall Rajbhandari, United Nations Environment Programme Regional Resource Centre for Asia and the Pacific, Thailand; Tunnie Srisakulchairak, United Nations Environment Programme Regional Resource Centre for Asia and the Pacific, Thailand; Christopher G. Zamora, Asean Centre for Energy, Indonesia.

EUROPE
Theo Beckers, Institute for Globalization and Sustainable Development, The Netherlands; Tom Bigg, International Institute for Environment and Development, United Kingdom; Hans-Georg Bohle, South Asia Institute, University of Heidelberg, Germany; Philippe Bourdeau, Université Libre de Bruxelles, Belgium; Ian Douglas, School of Geography, University of Manchester, United Kingdom; Jan Willem Erisman, Energy Research Centre of the Netherlands, The Netherlands; Susan Greenwood Etienne, Scientific Committee on Problems of the Environment, France; Sherry Heileman, France; Carlo Heip, Department of Ecosystems Studies, Centre for Estuarine and Marine Ecology, Netherlands Institute of Ecology, The Netherlands; Holger Hoff, Potsdam Institute for Climate Impact Research, Germany; Mikhail Ivanov, Institute for Microbiology, Russian Academy of Sciences, Russian Federation; Ola Johannessen, Nansen Environmental and Remote Sensing Center, Norway; Werner Klein, Fraunhofer Institute for Molecular Biology and Applied Ecology, Germany; Lucien Laubier, Centre d’Océanologie de Marseille, Station Marine d’Endoume, France; Edmund McManus, United Nations Environment Programme World Conservation Monitoring Centre, United Kingdom; Duncan McQueen, International Institute for Environment and Development, United Kingdom; Christian Nellemann, Global Resource Information Database-Arendal, Norway; Véronique Plocq Fichelet, Scientific Committee on Problems of the Environment, France; Hanna Reid, International Institute for Environment and Development, United Kingdom; Mirjam Schomaker, France; Uno Svedin, The Swedish Research Council for Environment, Agricultural Sciences and Spatial Planning, Sweden; Ronan Uhel, European Environment Agency, Denmark; Sonja Vermeulen, International Institute for Environment and Development, United Kingdom; Simon Wilson, Arctic Monitoring and Assessment Programme, The Netherlands; Adrian Wood, University of Huddersfield, United Kingdom.

LATIN AMERICA and the CARIBBEAN
Hernán Blanco, Recursos e Investigación para el Desarrollo Sustentable, Chile; Nicola Borregaard, Recursos e Investigación para el Desarrollo Sustentable, Chile; Francisco Brzovic Parilo, Instituto de Asuntos Públicos, Universidad de Chile, Chile; Gerardo Evia, Centro Latino Americano de Ecología Social, Uruguay; Eduardo Gudynas, Centro Latino Americano de Ecología Social, Uruguay; Edgar E. Gutiérrez Espeleta, Observatorio del Desarrollo, Universidad de Costa Rica, Costa Rica; Ramón Pichs, Centro de Investigación de la Economia Global, Cuba; Verónica Quirici, Centro Latino Americano de Ecología Social, Uruguay; Yosu Rodríguez Aldabe, Centro de Investigación en Geografía y Geomática "Ing. Jorge L. Tamayo" A.C., México; Osvaldo Sala, Departamento de Ecología, Facultad de Agronomía, Universidad de Buenos Aires, Argentina; Jose Sarukhán, Instituto de Ecología, Ciudad Universitaria, México.

NORTH AMERICA
Jackie Alder, Fisheries Centre, University of Vancouver, Canada; Sabrina Barker, Global Environment Monitoring System/Water, Environment Canada, Canada; Gene Berry, Lawrence Livermore National Laboratory, University of California, United States; Donald F. Boesch, University of Maryland Center for Environmental Science, United States; Joanna Burger, Rutgers University, United States; Pamela Chasek, International Institute for Sustainable Development/Earth Negotiations Bulletin, United States; Robert J. Diaz, Virginia Institute of Marine Science, United States; Noelle Eckley, International Institute for Sustainable Development/Earth Negotiations Bulletin, United States; Amie Figueiredo, United Nations Environment Programme, Division of Early Warning and Assessment - North America, United States; Andrew S. Fraser, Global Environment Monitoring System/Water, Environment Canada, Canada; James N. Galloway, Environmental Sciences, University of Virginia, United States; Chandra Giri, Science Application International Cooperation, Earth Resources Observation Satellites Data Center, United States; Alessandra Giuliani, United Nations Environment Programme, Regional Office for North America, United States; Betsy Hartmann, Population and Development Program, Hampshire College, United States; Susan Hassol, Aspen Global Change Institute, United States; Anthony C. Janetos, The H. John Heinz III Center for Science, Economics and the Environment, United States; Martin Jeffries, Geophysical Institute, University of Alaska, United States; David Keith, Department of Engineering and Public Policy, Carnegie Mellon University, United States; Tiina Kurvits, Global Resource Information Database-Arendal, c/o Canadian Polar Commission, Ottawa, Canada; Douglas A. Landis, Department of Entomology, Center for Integrated Plant Systems, Michigan State University, United States; Craig Long, National Oceanic and Atmospheric Agency, National Weather Service, United States; Gyde Lund, Forest Information Services, United States; William Mansfield, United Nations Environment Programme, Regional Office for North America, United States; Margaret McCauley, United States Department of State, United States; Jerry M. Melillo, The Ecosystems Center, Marine Biological Laboratory, United States; Ram Chandra Mishra, United Nations Environment Programme, Division of Early Warning and Assessment -North America, United States; Erika Monnati, United Nations Environment Programme, Division of Early Warning and Assessment – North America, United States; Derek Mueller, Centre for Northern Studies, Laval University, Canada; Ted Munn, Institute for Environmental Studies, University of Toronto, Canada; Adil Najam, Department of International Relations and Center for Energy and Environmental Studies, Boston University, United States; Ramakrishna R. Nemani, National Aeronautics and Space Administration Ames Research Center, United States; Joshua T. Newton, Department of Geosciences, Oregon State University, United States; Prisna Nuengsigkapian, International Institute for Sustainable Development/Earth Negotiations Bulletin, United States; Cheryl Palm, The Earth Institute at Columbia University, United States; Walter Rast, Aquatic Station, Department of Biology, Southwest Texas State University, United States; Richard Robarts, Global Environment Monitoring System/Water, Environment Canada, Canada; Mark Schulman, International Institute for Sustainable Development/Earth Negotiations Bulletin, United States; Joni Seager, Department of Geography, University of Vermont, United States; Sabrina Shaw, International Institute for Sustainable Development/Earth Negotiations Bulletin, United States; Robert L. Smith, United States; Chris Spence, International Institute for Sustainable Development/Earth Negotiations Bulletin, United States; Elsa Tsioumani, International Institute for Sustainable Development/Earth Negotiations Bulletin, United States; Lynn Wagner, International Institute for Sustainable Development/Earth Negotiations Bulletin, United States; Anne Whyte, Mestor Associates, Canada; Aaron T. Wolf, Department of Geosciences, Oregon State University, United States.

WEST ASIA
Mohammad S. Abido, Arabian Gulf University, Bahrain; Asma Ali Abu Hussein, Arabian Gulf University, Bahrain; Abdullah Al-Droubi, Arab Centre for the Studies of Arid Zones and Drylands, Syria; Sabah Al-Jenaid, Arabian Gulf University, Bahrain; Waleed K. Al-Zubari, Arabian Gulf University, Bahrain; Mohammed M. Awny, Arabian Gulf University, Bahrain; Mohamed Aiet Belaid, Arabian Gulf University, Bahrain; Ameur Ben Mansoura, Arab Centre for the Studies of Arid Zones and Drylands, Syria; Yousif H. Edan, Arabian Gulf University, Bahrain; Adel Gouda, Arab Centre for the Studies of Arid Zones and Drylands, Syria; Sherif Kandil, Arabian Gulf University, Bahrain; Anwar Sh. Abdoh Khalil, Arabian Gulf University, Bahrain; Saeed Abdulla Mohammed, Arabian Gulf University, Bahrain; Abdulnaser H. Zayed, Arabian Gulf University, Bahrain.

UNEP
Mahmood Y. Abdulraheem; Abdu Ghassim Al-Assiri; Alex Alusa; Abdul Elah Al-Wadaee; A. Basel Al-Yousfi; Fareed Bushehri; Dag Daler; Rob de Jong; Halifa Drammeh; Habib El-Habr; Ayman El-Talouny; Leone Gaetano; Jörn Heppeler; Melanie Hutchinson; Shafqat Kakakhel; Tim Kasten; Elizabeth Khaka; Isabel Martínez; Timo Maukonen; Patrick M’mayi; Kakuko Nagatani-Yoshida; Naomi Poulton; Daniel Puig; Mark Radka; Keith Robinson; Frits Schlingemann; Megumi Seki; Nalini Sharma; Surendra Shrestha; David Smith; Ricardo Sánchez Sosa; Anna Stabrawa; Esther Syokau; Sekou Toure; Veerle Vandeweerd; Brennan Van Dyke; Sabine Wildevuur.