In 2003 the United Nations Conference on Trade and Development (UNCTAD) published a “Manual for the Preparers and Users of Eco-Efficiency Indicators”: http://www.unctad.org/en/docs//iteipc20037_en.pdf
The main objective of this framework and guideline was to describe a method, which allows companies to provide information on their environmental performance in a systematic and consistent way over periods of time. The guideline defines five environmental performance indicators:
The guideline describes how the data for each indicator is to be consolidated and then related to the Net Value Added.
The performance indicators have been calculated for the period 2003 to 2007 (see the Comments on Reporting Year) and have been validated by the independent consulting company ELLIPSON, Basel:
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