ISDE in the fall of 1994 recognized 24 national and regional affiliates and had individual members in 50 countries, for a combined total of about 20,000 members. ISDE is headquartered in Switzerland and sponsors a Scientific Center and International School on Environment and Health, based in Italy. ISDE is officially recognized by the United Nations as a non-governmental organization. Today, health should be considered a state of physical, mental, social and ecological well-being. All people are responsible for the environment.
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