According to 60 Minutes (CBS; 4.1.07):
China and India two of biggest nations on Earth who have substantial dependence on glacial melt for fresh water. Now indisputable increase in rate of glacial melt may increase chance of water wars in the not-too-distant future.
I also found myself thinking about possibility of regular military or special ops units or satellite lasers or terrorists trying to blow up or otherwise accelerate melting rate of specific glaciers for geopolitical power motives.
Has anyone read or heard anything about this possibility in science fiction or fact?