National Geographic magazine continues a yearlong series examining the specific challenges and solutions we face as the worldwide population reaches 7 billion people in 2011 with a March story looking at humans' massive impact on the planet . Also in the March issue is "The Surprising Face of Seven Billion," a poster showing a composite face of the world's most typical person. Other stories will follow throughout 2011. To encourage discussion around the issue of population, National Geographic and the Aspen Institute are organizing the Aspen Environment Forum from May 30 - June 3, 2011.
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