As cities go high-tech, who benefits—and who’s being watched? Explore the promises and risks of smart cities, from efficiency to surveillance.

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CNBC's Uptin Saiidi looks at three cities infusing technology into every part of its operations. ----- Subscribe to CNBC International: http://cnb.cx/2gft82z Like our Facebook page https://www.facebook.com/cnbcinternational Follow us on Instagram https://www.instagram.com/cnbcinternational/ Follow us on Twitter https://twitter.com/CNBCi Subscribe to our WeChat broadcast CNBC_international
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