Climate change and emerging environmental pollutants are increasingly recognized as critical determinants of mental health worldwide. Rapid urbanization, rising ambient temperatures, and extreme weather events have been associated with elevated risks of depression, anxiety, sleep disturbances, and other neuropsychiatric outcomes. At the same time, exposure to emerging pollutants, including microplastics, per- and polyfluoroalkyl substances (PFAS), endocrine-disrupting chemicals, artificial light at night (ALAN), and novel airborne contaminants, may adversely...