Reuters: Farmers in the valleys of northern Pakistan fear for the survival of their summer crops after a short winter of low snowfall altered the flow patterns of mountain streams, potentially robbing the farmers of water they rely on to irrigate their fields. Experts at the Pakistan Meteorological Department (PMD) and senior weather observers posted at stations in Pakistan's Upper Indus Basin (UIB) say last winter's snowfall in most of the valleys of the Gilgit-Balistan province was as much as 70 percent...