This photo of Earth was taken by the Apollo 17 crew on Dec. 7, 1972. It's widely known as "The Blue Marble." (Photo courtesy of Earth Sciences and Image Analysis Laboratory, NASA)
State of the Environment report on Earth Day
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The director of the University of Minnesota's Institute on the Environment, Jon Foley, gives an Earth Day report card on the quality of our water, air and land. What are the biggest problems, and the biggest successes?
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Jonathan Foley: Director of the Institute on the Environment, University of Minnesota. McKnight Presidential Chair in the Department of Ecology, Evolution and Behavior. He also leads the Institute on the Environment's Global Landscapes Initiative.
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