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United Nations Environment Programme ,  Food and Agriculture Organization of the United Nations ,  [Sustainability of Biogas and Solid Biomass Value Chains in Ethiopia: Results and Recommendations from Implementation of the Global Bioenergy Partnership Indicators - Summary] ,  Sustainability of Biogas and Solid Biomass Value Chains in Ethiopia: Results and Recommendations from Implementation of the Global Bioenergy Partnership Indicators - Summary

United Nations Environment Programme ,  International Resource Panel ,  [International Trade in Resources: A Biophysical Assessment - Summary for Policy Makers] ,  International Trade in Resources: A Biophysical Assessment - Summary for Policy Makers