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This video is interesting and informative. In this video, National Geographic examines the specific challenges and solutions we face as the worldwide population reaches 7 billion people in 2011. Also in the March issue of National Geographic is “The Surprising Face of Seven Billion,” a poster showing a composite face of the world’s most typical person. For more information and photos about Seven Billion, go to National Geographic at http://bit.ly/hhYz3m.