Definition:
Valeur d’une chose en elle-même, indépendamment du fait que cette chose permette ou non de satisfaire des préférences et besoins personnels.
Source:
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Food and Agriculture Organization of the United Nations, AQUASTAT Web Site
Edward B. Barbier, Mike Acreman, and Duncan Knowler, 1997, Economic Valuation of Wetlands: a Guide for Policy Makers and Planners, Ramsar