Potvin, J. (1992). Classification and Appraisal Criteria for Conservation Investments: A proposed general framework. Unpublished working paper prepared under contract with The World Bank, for the Global Environment Facility.

This paper was prepared under contract to the World Bank at the request of Ian Johnson, founding Administrator of the Global Environment Facility (GEF) as a collaborative initiative of the World Bank, United Nations Development Program, and the United Nations Environment Program. The GEF began in 1992 as a $1B fund for projects that could achieve the reduction of greenhouse gas emissions, the protection of biodiversity, the protection of international waters and the reduction in ozone layer depletion.