As the study shows, wind and rain, in recent times, are spreading pollution: in Ibadan and
Lagos, and estimated thirty million residents have no integrated sewage system. As UN
Children’s Fund (UNICEF) had noted, about 12 percent of children in most Nigerian cities have
access to sanitation and 32 percent to improved drinking water. Consequently, water-borne
disease such as diarrhea kills thousands of children annually.