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China is building the world’s longest underwater tunnel beneath the Bohai Sea--at 76 miles long it will pass through two deadly earthquake fault zones, will be longer than the current first and second-ranked underwater tunnels combined and will cost $42 billion. Subscribe to TDC for more videos like this: https://www.youtube.com/TheDailyConversation/ More information on the Bohai Sea Tunnel: https://www.wikiwand.com/en/Bohai_Strait_tunnel Like our page on Facebook http://www.facebook.com/thedailyconversation Join us on Google+ https://plus.google.com/100134925804523235350/posts Follow us on Twitter http://www.twitter.com/thedailyconvo Video created by Bryce Plank