Climate change is a reality that can no longer be ignored, so much so that combating climate change and its impact is one of the main goals of the UN Agenda 2030. Youths, albeit the main victims of climate change, are often excluded from decision-making processes on sustainable actions. More and more young people are joining collective pro-environmental movements, raising their voices against the current inadequate sustainable policies and claiming to be the main actors of change. However, pro-environmental collective actions are often judged negatively by public opinion, diminishing their effectiveness and potentially impacting youth participation. In light of this, it is critical to understand the individual, contextual and relational aspects that lead young people to engage with these movements. The present study aimed to systematically review the existing literature on factors that might promote youth participation in pro-environmental movements. According to the PRISMA guidelines, we conducted a literature search of three databases (PsycINFO, ProQuest, and SCOPUS). Moreover, we deepened our research by focusing on two relevant theoretical models on collective actions, the Social Identity Model of Collective Action and the Social Identity Model of Pro-Environmental Action. After the screening and the eligibility phases, 11 articles (12 studies) were included. Most of the selected studies adopted a cross-sectional quantitative design. The results revealed individual and relational factors involved in promoting youths' involvement in pro-environmental movements. To the aim of deepening young people's pro-environmental activism, findings highlighted the need to consider personal and social drivers together. Limitations of the study, future directions, and practical implications are discussed.
Keywords: Climate change; activism; adolescents; pro-environmental movements; young adults.