... Science and Technology, 2009. [4] GATE and GTZ German Appropriate Technology Exchange (GATE) and German Agency for Technical Cooperation (GTZ), Biogas Digest Volume II: Application and Product ... status, future prospects and policy implications. Renewable and Sustainable Energy Reviews. 2001, 5(1), 97–112. [2] GATE and GTZ German Appropriate Technology Exchange (GATE) and German Agency for ... Efficientenergy conversion and utilization, wastewater treatment, renewable energy technology and policy, and CDM proposal development. He is also an associate of The Energy Centre, KNUST and a founding...