7 Billion by the National Geographic Society
10/31/2011

To coincide with the arrival of the world's 7 billionth person on October 31, 2011, National Geographic magazine's 2011 year-long series on world population is available on the App Store as a free app for iPad. The interactive app explores the challenges -- and potential solutions -- for coping with a growing human population in a world of limited resources with informative videos, interactive maps, in-depth articles and stunning photography. Click here to get the app.

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