In this study, the relationship between sustainable universities and environmental education is analysed from the aspect of tourism as seen by students. The research showed why green universities are important and what green applications were implemented at Budapest Business School. 1050 people participated in thesurvey examining the connections between green universities and environmentally conscious modes of living. All respondents were students of Budapest Business School and data was collected from the 18-22 years age group. We started out with the assumption that the students at Budapest Business School are aiming at becoming responsible citizens of tertiary education and as they will be senior and junior level managers they could exert great influence on the green development of the economy in the future. The authors consider it a success, that a green university will lead the ranking of universities which will become the winners of the 4th industrial revolution. Mastering sustainable subjects improve comprehensive and cohesive thinking. Energy and cost reduction is not the only goal in higher education; integrating sustainable subjects into courses and putting them into practice are also important. The courses in sustainable tourism significantly re-evaluate students’ commitment to sustainable development.