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b'Successful arms-control diplomacy has kept proliferation at bay for decades. But many states now have nuclear ambitions; we look at an increasingly worrying shift. Rapid development in sub-Saharan Africa has led to a \\u201cdouble burden\\u201d of malnutrition: obesity is skyrocketing even as undernourishment continues. And the riches and the tensions to be found at a Greenland rare-earth-minerals mine. For full access to print, digital and audio editions of The Economist, subscribe here www.economist.com/intelligenceoffer

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