Professor Yong Sik Ok (IMAGE) Cactus Communications Caption Professor Yong Sik Ok, a globally renowned expert from Korea University, is revolutionizing environmental sustainability through his pioneering research on biochar. As the President of the International Society of Trace Element Biogeochemistry (ISTEB) and the International ESG Association (IESGA), Prof. Ok's contributions have profoundly impacted academic research and practical environmental solutions. Credit Professor Yong Sik Ok Usage Restrictions You are free to share the material. Attribution is required. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.