This article draws from a study investigating the life trajectories of 17 youth climate activists from 14 countries through semi-structured, life memory interviews using Internet-based methods. The interpretations of the interviews focus on the ways in which participants constructed the meanings and functions of experiences and how they represented the nature of the process of their committing to climate activism. Included in the interpretations are the nature of moments of consciously committing, the role of both concern for nature and for social justice, the dynamic and ceaseless process of committing, and the role of the youth climate movement. The discussion highlights the uniqueness of youth and of climate change in the process of committing. The research contributes to the limited but important literature on the life trajectories of youth climate activists.