U.S. Department of the Interior, U.S. Geological Survey news release: “The United States faces the potential for abrupt climate change in the 21st century that could pose clear risks to society in terms of our ability to adapt. “Abrupt” changes can occur over decades or less, persist for decades more, and cause substantial disruptions to human and natural systems. A new report, based on an assessment of published science literature, makes the following conclusions about the potential for abrupt climate changes from global warming during this century.”