Reuters: Afghanistan needs billions of dollars for dams and irrigation to feed and provide power for its growing population after decades of war, with future water supply a major security challenge, Afghan and foreign officials say. Most of Afghanistan’s precious water is allowed to flow out to its neighbors, a situation which must be changed quickly if the country is to sustain itself, deputy Water and Energy Minister Shujauddin Ziayee told Reuters recently. “In 30 years, the size of …