ผู้เขียน: Dong Guo

Steven Cohen is senior vice dean of the School of Professional Studies and professor in the practice of public affairs in the School of International and Public Affairs at Columbia University. He is also director of the Earth Institute’s Research Program on Sustainability Policy and Management as well as two other masters’ programs at Columbia University.Dong Guo is an associate research scholar and associate director of the Research Program on Sustainability Policy and Management at Columbia University’s Earth Institute. He is also an adjunct assistant professor in the School of International and Public Affairs at Columbia University.