- ACCOR
- Active Travel Group
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- African Tourism Council
- AITO The Specialist Travel Association
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- Alianza Mesoamericana de Ecoturismo
- Amazonas Explorer
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- ANVR - Dutch Association of Travel Agents and Tour Operators
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- APAVT ASSOCIAÇÃO PORTUGUESA DAS AGENCIAS DE VIAGENS E TURISMO
- Apumayo expediciones Peru
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- Associação Dark Sky/ Dark Sky Association
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- Autoridad de Turismo de Panamá. ATP
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- Barbados Tourism Marketing Inc.
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- Bucuti & Tara Beach Resort, Aruba
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- Butterfield & Robinson
- Byway
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- Cairngorms Business Partnership
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- Cairngorms National Park Authority
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- Carey Tourism
- Caribbean Hotel & Tourism Association
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- Center for Responsible Travel (CREST)
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- Centre of Expertise Leisure, Tourism & Hospitality (CELTH)
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- Chumbe Island Coral Park Ltd
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- Confederación Española de Organizaciones Empresariales (CEOE )
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- Conference of Peripheral Maritime Regions - CPMR
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- CYPRUS SUSTAINABLE TOURISM INITIATIVE -CSTI-
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- Dallas Fort Worth International Airport (DFW)
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- Destination Stewardship Center
- Destination Vancouver
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- DESTINATURE - Agência para o Desenvolvimento do Turismo de Natureza
- Deutsche Bahn AG
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- Dorset Climate Action Network
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- Dreamcatcher South Africa NPC
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- Echidna Walkabout Nature Tours, Australia
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- EUROPA MUNDO VACACIONES, S.L.U.
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- European Sustainable Hospitality Group
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- European Tourism Association AISBL (ETOA)
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- forum anders reisen e.V. (FAR)
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- Future of Tourism Coalition
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- Global Destination Sustainability Movement
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- Global Ecotourism Network
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- Global Sustainable Tourism Council (GSTC)
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- Göteborg & Co
- Government of the Federated States of Micronesia
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- Govindamangalam Homestay
- Green Cross France et Territoires
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