The UN estimated that the World population exceeded 7 billion on Monday 31st October. The UN also believes that the World's population could rise to 10 billion by the end of the century. Watch the video on the first link describing the growth and then go to the second link to calculate where you fit into the 7 billion.
http://www.bbc.co.uk/news/world-15517220
http://www.bbc.co.uk/news/world-15391515
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