Sustainability and green matters are emerging issues among youth in the 21st century. The European Union (EU) emphasises youth discourse on greener thinking and lifestyle, which aims to build an open-minded, green, and digital future. Therefore it is crucial to provide appropriate education and shape attitudes towards green issues. Regarding this scope, four universities of the European Capitals of Cultures (ECoC), the University of Pannonia (Veszprém, Hungary), University of Tartu (Estonia) Vytautas Magnus University (Kaunas, Lithuania), and West University of Timisoara (Romania), allied to develop a MOOC course interconnecting green related topics and communication skills and methods. The case study summarizes the main findings of the questionnaire (with 701 youth between 18-25 age), the desktop and focus group interviews research that gave the bases of developing the MOOC course material of GreenCool Erasmus projects. First the primary data, reflecting aspects of the involvement of young people in fighting climate crisis was analysed. The ultimate goal was to come up with a well-documented profile of students in tertiary education, reflecting their 'green' and 'communication' profiles as agents in fighting climate change. Second, taking the outcomes into consideration, the 4 universities carried out focus group interviews with 27 participants: influencers, green and communication experts and university students. As a result the green and communication topics were identified. This led to those methodological tools that were appropriate and effective in developing the GreenCool MOOC material and the corresponding blended Greenfluencer course with the provisional title: ‘Attitudes shaping communication techniques and green related topics in the 21st Century’. The case study describes the process and the results.