NPR's Tavis Smiley talks with Jeffrey Sachs, director of the Earth Institute at Colombia University, a professor of health policy and management, and special adviser to U.N. Secretary General Kofi Anan. Sachs is known for his work with international agencies in promoting poverty reduction, controlling disease and pushing down the debt of poor countries. He was also named by Time magazine as one of the 100 most influential leaders in the world.
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