Erasmus+ Project “Think Big, Act Green” aims at providing capacity building to the 33 female and male participants from Curacao, Cyprus, Tenerife, and Madeira (aged 18-26) that they act socially and environmentally responsible citizens. Accordingly to achieve it, following objectives has been developed by participating youth: learn from each-other about climate change, sustainable consumption and lifestyles; share practical tools, which will positively engage, inform and enable behavioral and attitudinal changes among us and our peers, family members, friends back to communities; and, lastly to help each-other to understand different cultures and promote interactions, networks and partnership between island youth. The methodology which will be utilized during the youth exchange includes a combination of nonformal learning methods such as icebreakers & energizers, interactive workshops, teambuilding activities, inter-cultural events, hands-on experiences, informal leisure and evaluation, and reflective sessions. Through which, the participating youth will be able to share their experiences, learn to live together and adopt an eco-citizen behavior. Participation in the project will encourage them to lead a healthier and more ethical lifestyle, whilst becoming active citizens rather than passive consumers.