Around 90 per cent of people go through their daily lives breathing harmful polluted air, which has been described by the United Nations as the most important health issue of our time.
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How can countries grow their economies and keep air pollution in check at the same time? A new World Bank report explores that tricky question, looking at the kinds of policies and actions three leading cities have taken to tackle poor local air quality, providing lessons for other cities. As we mark World Cities Day
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