This episode of Africa Science Focus continues to investigate the pollution of the Osun River in southwest Nigeria, delving into the environmental impact of gold mining along its banks. Olugbenga Okunlola, professor of geology at the University of Ibadan, Nigeria, joins our reporter, Babatunde Okunlola, to talk about the gold deposits in Osun state and the region's environmental dynamics. We hear from miners and ecological experts about the soil erosion, vanishing forests, and polluted ...