The accelerating climate crisis represents not only an environmental challenge but also a profound generational dilemma. This chapter focuses on examining how youth, situated between vulnerability and agency, confront systemic crises and drive pathways of transformation in a warming world. The findings reveal that while young people are disproportionately exposed to climate risks (including anxiety, health burdens, and social precarity), they are simultaneously reshaping politics through activism, digital mobilization, litigation, and cultural expression. Youth movements have disrupted established governance systems by reframing climate change as a justice and intergenerational issue, pressuring institutions to acknowledge the urgency of reform. The chapter also highlights the contradictions within youth engagement: tokenization, exclusion from decision-making, and the psychological costs of activism frequently undermine their potential impact. The generational imbalance in political power is not accidental but reflective of a broader shift toward gerontocratic governance. With nearly all global climate agreements negotiated by leaders far removed in age from the youth most affected by future warming, intergenerational justice has become a central axis of climate politics. Nevertheless, youth visions of climate justice, degrowth, indigenous resurgence, and intergenerational solidarity demonstrate viable alternatives to entrenched political and economic systems. The chapter concludes that youth agency is not peripheral but central to reimagining democracy, sustainability, and justice in the climate era. Embedding youth voices in governance structures and fostering cross-generational alliances are emerging as critical pathways for systemic change.