PBS NewsHour

World's Population Teeters on the Edge of 7 Billion --...

Clip: 10/27/2011 | 9m 29s

In partnership with the Pulitzer Center and National Geographic, the NewsHour explores how the composition of our society is changing as the world population reaches 7 billion people. Hari Sreenivasan has the details.

Aired: 10/27/11

Rating: NR

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