Nomadic Pastoralism, Climate Change, and Conflict in Africa

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http://www.nber.org/papers/w28243#fromrss

Arid regions of Africa are expanding by thousands of square kilometers a year, potentially disturbing pastoral routes that have been forged over a long period of time. This disturbance is often said to explain why “herder-farmer” conflicts have erupted in recent years, as pastoralists and agriculturalists compete for increasingly scarce