There are people who work their entire lives quietly, yet their footprints remain deeply imprinted on the lands they have passed through, like an underground stream that silently nourishes an entire forest. Associate Professor Dr. Le Van Thang, Vice President of Vietnam Association for Conservation of Nature and Environment, former Director of the Institute of Resources and Environment at Hue University, and former Dean of the Faculty of Environment at the University of Sciences, Hue University, is one such person.