Planet Forward, George Washington University School of Media and Public Affairs
Jeffrey Sachs, Director of the Earth Institute at Columbia University, presents his Twelve Grand Challenges for Sustainable Development at GW's Elliott School of International Affairs.
The George Washington University
Lawson Brigham, professor at University of Alaska Fairbanks and governor of the American Polar Society, answers the question "As climate change opens up new trade opportunities in the Arctic, how will populations be affected?".