--- - doi: 10.1073/pnas.0907998106 identifier: 10.1073/pnas.0907998106 journal_identifier: proceedings-national-academy-of-sciences-united-states-america journal_pages: 20670-20674 journal_vol: 106 notes: ~ title: Warming increases the risk of civil war in Africa uri: /article/10.1073/pnas.0907998106 url: ~ year: 2009