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Ph.D. James E. HANSEN Director, NASA Goddard Institute for Space Studies, New York

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Hansen heads the NASA Institute for Space Studies in New York City, which is a division of Goddard Space Flight Center's (Greenbelt, MD), Sciences and Exploration Directorate, and is an Adjunct Professor of Geology at Columbia University's Earth Institute. He was trained in physics and astronomy in the space science program of Dr. James Van Allen at the University of Iowa. His early research on the properties of clouds of Venus led to their identification as sulfuric acid. Since the late 1970s, he has worked on studies and computer simulations of the Earth's climate for the purpose of understanding the human impact on global climate. He is perhaps best known for his testimony on climate change to congressional committees in the 1980s, which helped raise broad awareness of the global warming issue. He was designated by Time Magazine as one of the 100 most influential people in 2006.

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