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Lesley Curwen talks to Fatih Birol, the Chief Economist of the International Energy Agency, who warns that efforts to hold back a rise in global temperatures need to be stepped up, but the likelihood of that happening is not high. And how do you calculate inflation as it's happening around the world? Economics professor Alberto Cavallo from MIT Sloan School of Management can tell us. Plus, the Â鶹Éç's Jamie Robertson holds forth about the increasing trade in racing pigeons - in places like Shanghai and Kuwait.