The two study areas are inhabited by people of mixed cultural background and the languages are predomin- antly Ijebu/Yorubas. They are also inhabited by Olabisi Onabanjo University students and workers including lec- turers and other non-teaching staff. The people are mostly farmers planting cocoa, cassava, kolanuts, and so on, while some are engaged in small-scale businesses. The local government headquarters are in Ijebu-Igbo at Oke-Sopen. There are seven political wards: three wards, including Oru, are located in the southern axis of the local government, and four wards, including the control study area, are located in the northern axis of the local government. The local government has social infrastruc- tures such as electricity, water.
