Effectiveness of an Educational Training Program on Nursing Students’ Sustainability Knowledge, Attitudes, and Behaviors Toward Green Hospital Practices

Background: Healthcare systems contribute substantially to environmental pollution, making sustainability education an essential component of nursing curricula. Preparing nursing students to implement environmentally responsible practices is fundamental to sustainable healthcare delivery. This study evaluated the effectiveness of a structured educational training program on nursing students’ knowledge, attitudes, and self-reported behaviors regarding green hospital practices and sustainability in maternity care. Methods: A post-test-only quasi-experimental study was conducted among 240 undergraduate nursing students enrolled in the Obstetrics and Gynecological Nursing Department between October and December 2025. Participants were randomly assigned to either an intervention group (n = 120), which received a structured sustainability-focused educational training program covering sustainable healthcare principles, green hospital practices, healthcare waste management, resource conservation, environmentally responsible maternity care, and the role of nurses in promoting sustainability, or a control group (n = 120), which received the standard nursing curriculum. Outcomes were assessed using a validated structured questionnaire measuring sustainability-related knowledge, attitudes, and self-reported behaviors across environmental, social, and economic domains. Data were analyzed using descriptive and inferential statistics, with statistical significance set at *p* < 0.05. Results: Students in the intervention group demonstrated significantly higher knowledge, attitude, and self-reported behavior scores than those in the control group across all sustainability domains (all *p* < 0.001). Conclusions: The structured educational training program significantly improved nursing students’ sustainability-related knowledge, attitudes, and self-reported behaviors. Integrating sustainability education into undergraduate nursing curricula may enhance students’ preparedness to implement environmentally responsible practices in maternity care. Further multicenter studies with longer follow-up are recommended to evaluate the long-term effectiveness of sustainability education.