The below is an alphabetically ordered listing of all Major Groups organizations that have contributed to this website and the overall Rio+20 preparatory process. Click on the links for further information on each organization.

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• Asociación proyecto Gobernanza Democrática Mundial ? World Democratic Governance project association (apGDM ? WDGpa)
• Aspen Institute
• Associacao Brasileira de Entidades Estaduais de Meio Ambiente - ABEMA
• Associação Nacional de Órgãos Municipais de Meio Ambiente (ANAMMA)
• Association des Populations des Montagnes du Monde (APMM/WMPA)
• Association européenne des élus de montagne (AEM)
• Association for Defense of Nature (Prodena) and Ecosophy Foundation (EF)
• Association for Protection of Environment and Culture (APEC-Nepal) and Atlantic States Legal Foundation (ASLF), Inc. (NGO), USA
• Association for the Advancement of Sustainability in Higher Education
• Association of the Bar of the City of New York
• Association of World Citizens
• Associations 21
• Ateliers Terre
• Atlantic States Legal Foundation
• Aube Nouvelle pour la Femme et le Développement (ANFD)
• Australasian Campuses Towards Sustainability (ACTS)
• Australian Bureau of Statistics
• Automobile Association of Southern India
• Automobile Club of Moldova
• Automóvil Club del Ecuador ANETA
• Aviva
• AVSi Foundation
• Axia Sustainability
• Baha'I International Community
• Bahrain Women Association for Human Development