A new United Nations report says melting glaciers and ice sheets caused by global warming could disrupt drinking and agricultural water supplies for up to 40 percent of the world's population.
The report released Monday said the depletion of ice caps could also contribute to global warming because the ice sheets reflect the sun's heat away from the Earth's surface.
It also warns that such low-lying countries as Bangladesh and Indonesia could face severe flooding by melting glaciers and rising sea levels.
Global warming will be a major topic at this week's Group of Eight summit in Germany.
German Chancellor and summit host Angela Merkel says she will not compromise in getting the G8 nations to agree to cut greenhouse gas emissions that contribute to global warming.
Some information for this report was provided by AFP and AP.