Dawn: It is up to the developed countries and emerging powers to arrest the slide before it is too late. — White Star The initial deluge will be followed by drought and extreme privation, and possibly even war. As writer and social activist Arundhati Roy pointed out in Karachi on Friday, glacial melt in the Himalayas should be cause for serious concern in both India and Pakistan. The impact, when it comes, will be widespread and inflict massive suffering on other countries and …