“Improving Environmental Literacy on the Dangers of Microplastics and Reducing Single-Use Plastics through an Environmentally Friendly School Program at Al-Razi Sinar Harapan Vocational High School Medan”. JURNAL PENGMAS KESTRA (JPK) 6, no. 1 (July 1, 2026): 1–7. Accessed July 6, 2026. https://ejournal.medistra.ac.id/index.php/JPK/article/view/3660.