Climate

The long war leading to South Sudan's recent independence began during the powerful El Niño drought of 1983. In continuing hostilities, southern fighters display a grenade launcher captured from northern Sudanese, July 2011.
(Trevor Snapp/Global Post)

In the first study of its kind, researchers have linked a natural global climate cycle to periodic increases in warfare.

More than half the world’s population live in cities, many of which are increasingly vulnerable to the impacts of climate change.

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