Why many World Heritage sites are at risk

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UNESCO's World Heritage site designation aims to protect the world's most valuable natural and cultural treasures. But often, that designation is not enough. Click here to subscribe to The Economist on YouTube: http://econ.trib.al/rWl91R7 Daily Watch: mind-stretching short films every day of the working week. For more from Economist Films visit: http://films.economist.com/ Check out The Economist’s full video catalogue: http://econ.st/20IehQk Like The Economist on Facebook: https://www.facebook.com/TheEconomist/ Follow The Economist on Twitter: https://twitter.com/theeconomist Follow us on Instagram: https://www.instagram.com/theeconomist/ Follow us on LINE: http://econ.st/1WXkOo6 Follow us on Medium: https://medium.com/@the_economist
Date: 
2017-04-17 23:53:32
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