Nurfitriani M Siregar, Gina Sonya Pane, Mhd Alwi Ritonga, Iqbal Hakim Hasibuan and Ahmad Riski Sulaiman Nasution 2025. Building Environmental Awareness through Communication in the Coastal Areas of Batahan Subdistrict, Mandailing Natal, North Sumatra. International Journal of Community Service Implementation. 3, 3 (Dec. 2025). DOI:https://doi.org/10.55227/ijcsi.v3i3.475.