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Watch Iranian President Rouhani's address to United Nations

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PBS News Hour

How data is helping asthmatics breathe easier

Since 2012, an innovative project in Louisville, Kentucky, has been collecting data on hundreds of the city's asthmatics by attaching GPS trackers to their inhalers to help residents better manage their asthma, monitor air pollution and shape future public health policies. NewsHour's Christopher Booker reports as part of a Citi Foundation-funded series called Urban Ideas.
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