An auto expert and former Energy Department adviser says the policies of a handful of states have pushed the development of electric vehicles. How the U.S. could win the global competition for the car of the future.
The world population is projected to reach nine billion by 2040. An update on global population trends and sustainability.
- Hania Zlotnik director, Population Division, United Nations
- Paul Ehrlich president, Center for Conservation Biology, Bing Professor of Population Studies, Stanford University and author of "The Dominant Animal" and "The Population Bomb"
- William Butz president and CEO, Population Reference Bureau
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