Just ahead of the first presidential debate, a trove of tax documents suggests the president has some staggeringly loss-making businesses and a staggering amount of debt coming due. We examine China’s pledge to become carbon-neutral by 2060 and what it will have to do to get there. And why a Swiss referendum campaign involved a giant game of pick-up-sticks.For full access to print, digital and audio editions of The Economist, subscribe here www.economist.com/intelligenceoffer
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