Nigeria is awash with dangerous pesticides

For quite a while, Nigeria has been talking up its desire to end its reliance on oil money and earn more from other sources, especially farming. Its population of around 213m, the biggest in Africa, has some 37m hectares of fertile land. But it grows too little on it.Worse, some of its produce isn’t healthy. Food exported to Europe and America has been rejected because of its excessive residue of pesticide. To feed Nigeria’s own people, let alone markets abroad, farmers will have to cut back on their use of some chemicals.