OVERVIEW OF ENVIRONMENTAL POLICY ON SAND HARVESTING AND ITS EFFECT TO THE SUSTAINABILITY OF RIVERS IN MAKUENI COUNTY. African Journal of Emerging Issues, [S. l.], v. 4, n. 1, p. 1–17, 2022. Disponível em: https://ajoeijournal.org/sys/index.php/ajoei/article/view/249. Acesso em: 10 sep. 2025.