IntroductionEco-anxiety is an increasingly important psychological response to the climate crisis, particularly among adolescents, whose developmental stage is characterised by identity formation, emotional change, and future-oriented thinking. This study explored how adolescents experience and interpret eco-anxiety.MethodsThis qualitative case study employed semi-structured interviews with five Czech adolescents aged 15–19 years who reported concerns about climate change. Data were analysed using thematic analysis combining inductive and theory-informed approaches.ResultsFour overarching themes were identified: emotions, threats, social environment, and coping. Participants described a strong connection to nature alongside feelings of sadness, helplessness, anger, frustration, and hope. Climate-related concerns were linked not only to environmental degradation but also to perceived societal indifference, political inaction, and intergenerational responsibility. Experiences of misunderstanding and trivialisation contributed to feelings of isolation, whereas supportive peers and role models served as important protective factors. Coping strategies included seeking social support, spending time in nature, maintaining realistic boundaries regarding personal responsibility, and, in some cases, professional psychological support.DiscussionEco-anxiety in adolescence appears to be a complex and contextually grounded response to climate change. Although it may contribute to distress when accompanied by helplessness and lack of support, it can also promote meaning-making, social connection, and constructive engagement. These findings highlight the importance of understanding adolescent eco-anxiety as a legitimate response to the climate crisis and of supporting young people through social and psychological resources.