I was invited by a teacher to visit the Tunel Emisor Oriente is a 62km long underground wastewater treatment tunnel being built in Mexico City, Mexico. It is also known as the Eastern Discharge Tunnel. Currently it is scheduled for a 2014 opening and is set to be one of the largest wastewater tunnels in the world.The tunnel will run from Mexico City to the state of Hidalgo, where various water treatment plants are under construction.
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