Climate change is increasingly recognised as a significant global health threat with profound implications for mental health and psychosocial well-being. This paper examines the complex and multidimensional relationship between climate change and mental health, drawing on emerging evidence from global studies, policy reports, and interdisciplinary research. It highlights how both acute climate-related events such as floods, wildfires, heatwaves, and storms and slowonset environmental changes, including drought, desertification, and sea-level rise, contribute to a wide spectrum of mental health outcomes. These range from clinically diagnosed conditions such as anxiety, depression, and posttraumatic stress disorder (PTSD) to emerging constructs such as eco-anxiety and solastalgia, which capture the emotional and existential distress associated with environmental degradation and uncertain futures. The paper further explores the key pathways through which climate change affects mental health, including direct exposure to disasters, indirect socioeconomic disruptions such as displacement and livelihood loss, and anticipatory stress linked to perceived future risks.Particular attention is given to populations that are disproportionately affected, including children and youth, low-income communities, Indigenous populations, and frontline workers, who often face heightened exposure and limited adaptive capacity. Evidence reviewed in this study consistently demonstrates elevated levels of psychological distress among these groups, underscoring the inequitable burden of climate-related mental health impacts. In addition, the paper synthesises current evidence on interventions and policy responses, emphasising the importance of integrating mental health into climate adaptation, disaster preparedness, and health system strengthening. Community-based approaches, social support mechanisms, and climate-resilient health systems are identified as critical components for mitigating adverse mental health outcomes. However, significant research gaps remain, including limited longitudinal data, lack of standardised measurement tools, and insufficient evidence from low- and middle-income countries.