Globalization is a fundamental factor affecting higher education in this century. More than ever before, the processes of globalization are being integrated into a set of social, technological, economic, cultural and ecological factors, so that we are now beginning to accept that we are facing a completely irreversible world-wide phenomenon. The concept of sustainable development integrates these factors and leads, beside environmental education, to a demand for global learning and education for sustainable development. To get a better understanding of the subject, the decision-game "Prisoner's Dilemma" focuses on the aspect of the public good. (Contains 3 footnotes, 3 tables and 4 figures.)