In the context of growing concern over the global environment and related sustainability issues, the purpose of this research is to stimulate discussion about the Environmental Performance Index (EPI) and its necessary role not only in measuring postgraduate students' attitudes about EPI, and its nine categories underpinned, but also, their important role in the development of appropriate curriculum of programs that are about environmental management and sustainable development as well. Further on, the obtained results of the presented research in the paper broaden the understanding of the opportunities for not only the Republic of Serbia but every country as well, in using the EPI methodology as it has a wide applicability in improving environmental pillars of their future sustainability.