SciDev.Net: A dispute about whether climate change will cause more wars in Africa heated up last week with the publication of a study that pours cold water on the link. “The primary causes of civil war are political, not environmental,” said Halvard Buhaug, a political scientist from the Peace Research Institute Oslo, Norway, whose study, published in Proceedings of the National Academy of Sciences yesterday, challenges theories that increasing pressure on food and water security caused by …