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"Climate scientists say Colombia's glaciers could disappear within 15 years. Wet highland areas that provide much of the country's fresh water are getting warmer and drier. And each year, flooding becomes more severe. The coastal area of Tumaco has become an example of how environmental and security pressures are undermining previously stable communities."

A new study shows that ice melts far more extensively at the base of the Antarctic ice sheet, miles below the surface, than scientists had thought. The findings raise the possibility that melt water may even help govern the behavior of glaciers.