World Population
http://thedianerehmshow.org/shows/2009-04-22/world-population
The world population is projected to reach nine billion by 2040. An update on global population trends and sustainability.
Guests
William Butz
president and CEO, Population Reference Bureau
Paul Ehrlich
president, Center for Conservation Biology,
Bing Professor of Population Studies, Stanford University and author of "The Dominant Animal" and "The Population Bomb"
Hania Zlotnik
director, Population Division, United Nations
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