Birdlife International

Location: Cambridge CB NA, United Kingdom. More...

Business Enterprises for Sustainable Travel (B.E.S.T.)

Location: New York, NY, U.S.A.. More...

Campaign for Environmentally Responsible Tourism (CERT)

Location: London SE QB, United Kingdom. More...

Caribbean Alliance for Sustainable Tourism (CAST)

Location: San Juan, Puerto Rico. More...

Caribbean Conservation Association (CCA)

Location: St Michael, Barbados. More...

Caribbean Conservation Corporation (CCC)

Location: Gainsville, FL, U.S.A.. More...

Cocos International e.V.

Internationale Arbeitsgemeinschaft für Entwicklungs-Destinationen

Location: Düsseldorf, Germany. More...

Conservation Foundation

Location: London SW AR, United Kingdom. More...

Conservation International

Ecotourism Programme

Location: Washington, DC, U.S.A.. More...

Conservation Monitoring Centre

Location: Cambridge CB DL, United Kingdom. More...

Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES)

CITES Secretariat

Location: Châtelaine-Geneva, Switzerland. More...

Cultural Survival

Location: Cambridge, MA, U.S.A.. More...

DestiNet - Sustainable Tourism Information Portal

Location: , . More...

Earth Council

Location: San José, Costa Rica. More...

Earth Island Institute

Location: San Francisco, CA -, U.S.A.. More...

ECOCLUB International Ecotourism Club

Location: Athens, Greece. More...

Ecosource

Location: , . More...

Eco-Tip

Location: , . More...

Ecotourism Resource Centre

Location: , . More...

Eco-Tour

Location: , . More...

Ecotrans

Location: , . More...

EcoturismoLatino

Location: Cuernavaca, Morelos, Mexico. More...

European Community Network for Environmental Travel and Tourism (ECoNETT)

Location: London EW HA, United Kingdom. More...

Europe Conservation

Location: Rome, Italy. More...

Fédération International de Camping et de Caravaning

Location: Brussels, Belgium. More...

Federation of Nature and National Parks of Europe (EUROPARC Federation)

Location: Grafenau, Germany. More...

Fauna and Flora International

Location: Cambridge CB TT, United Kingdom. More...

Foundation for Environmental Education in Europe (FEEE)

Location: Norwich NR SZ, United Kingdom. More...

Global Environment Facility

Location: Washington, DC, U.S.A.. More...

Global Nature Fund

International Foundation for Environment and Nature

Location: Radolfzell, Germany. More...

Green Globe

Location: Brisbane, QLD, Australia. More...

Green Globe International

Location: Murrieta, CA, U.S.A.. More...

Green Hotels Association

Location: , . More...

GreenNet

Location: London N PF, United Kingdom. More...

Greenpeace International

Location: DW Amsterdam, Netherlands. More...

Green Travel

Location: , . More...

Intergovernmental Panel on Climate Change

Location: Geneva, Switzerland. More...

International Society for Eco-Tourism Management (ECOMANAGE)

Location: , . More...

International Centre for Integrated Mountain Development

Location: , . More...

International Council for Local Environmental Initiatives (ICLEI)

Location: Toronto, ON MH N, Canada. More...

International Hotels Environment Initiative

Location: London NW QR, United Kingdom. More...

International Institute for Environment and Development (IIED)

Location: London WCH DD, United Kingdom. More...

International Society for Environmental Protection (ISEP)

Location: Vienna, Austria. More...

Nature Friends International (NFI)

Location: Vienna, Austria. More...

Ökologischer Tourismus in Europa e.V. (Ö.T.E.)

Location: Bonn, Germany. More...

Planeta Platica - Ecotourism in Latin America

Location: , . More...

Rainforest Alliance

Location: San José, Costa Rica. More...

Responsible Travel

Location: , . More...

Rethinking Tourism Project (RTProject)

Location: Minneapolis, MN -, U.S.A.. More...

South Pacific Regional Environment Programme

Location: Apia, Samoa. More...

Survival

Location: London WCN QL, United Kingdom. More...

Sustainable Tourism Co-operative Research Centre

Location: Griffith University, QLD, Australia. More...

Sustainable Tourism Research Interest Group (STRING)

Location: , . More...

SustainableTourism.net

Location: London W SD, United Kingdom. More...

Sustainable Travel International

Location: Boulder, CO, U.S.A.. More...

SustainableTravel.org

Location: , . More...

The Bodhi Tree Foundation

Location: New York, NY, U.S.A.. More...

The Centre for Our Common Future

Location: Geneva, Switzerland. More...

The Foundation for Environmental Conservation

Location: Grand-Saconnex, Switzerland. More...

The International Ecotourism Society (TIES)

Location: Washington, DC, U.S.A.. More...

The Nature Conservancy

Ecotourism Program

Location: Arlington, VA, U.S.A.. More...

The Tour Operator's Initiative for Sustainable Tourism

Location: Madrid, Spain. More...

United Nations Convention to Combat Desertification (UNCCD)

Location: Bonn, Germany. More...

United Nations Environment Programme (UNEP)

+MAYBE OTHER NUMBERS???

Location: Nairobi, Kenya. More...

United Nations Environment Programme

Location: Paris Cedex, France. More...

United Nations Framework Convention on Climate Change (UNFCCC)

Location: Bonn, Germany. More...

World Congress on Tourism for the Environment

Location: Silverton, OR, U.S.A.. More...

World Conservation Union (IUCN)

Location: Gland, Switzerland. More...

World Meteorological Organization (WMO)

Location: Geneva, Switzerland. More...

World Society for the Protection of Animals (WSPA)

Location: London SE TP, United Kingdom. More...

World Wide Fund For Nature (WWF)

Location: Gland, Switzerland. More...