The document outlines the proceedings of the 9th International Conference on Envirotech, Cleantech, and Greentech held in Bangkok, Thailand, from December 29-30, 2016. It covers various research papers addressing topics such as ethnomedicine, unconventional gas production, wastewater treatment using hybrid napier grass, enzymatic biotransformation of stevioside, and genetic analysis for drought tolerance in wheat. Additionally, it highlights the integration of religious faith and indigenous knowledge for sustainable development and environmental management.