Water and ice

The Arctic sea ice lost 14% of its area and 40% of its total thickness between 1978 and 1998. If present trends continue, many of the world’s mountain glaciers will disappear. All glaciers will be gone from Glacier National Park, Montana, by 2050. Iceland's glaciers will decrease by 40 per cent by 2100 and virtually disappear by 2200.
US Geological Survey
Global warming will diminish the amount of water stored as snow in the Western United States by up to 70 per cent in the coastal mountains over the next 50 years, leading to increased fall and winter flooding and severe spring and summer drough.
Pacific Northwest National Laboratory, US Department of Energy
The cost for relocating Alaskan native villages because of flooding and erosion due to melting permafrost will be $100-400 million
US Global Change Research Program
U.S. Government Accountability Office

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