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Hansen

Dr. James Hansen is best known for bringing global warming to the world's attention in the 1980s, when he first testified before Congress. An adjunct professor in the Department of Earth and Environmental Sciences at Columbia University, he was until recently the director of the NASA Goddard Institute for Space Studies. Dr. Hansen's background in space and earth sciences allows a broad perspective on the status and prospects of our home planet. He is the author of Storms of My Grandchildren .