National: Water is the Middle East’s most vulnerable resource, and will become dangerously scarce within decades unless it is radically better managed, the World Bank said in a report released here yesterday. In the Middle East and North Africa, the world’s driest region, “per capita water availability is predicted to halve by 2050 even without the effects of climate change”, said the Development and Climate Change study. It added that climate change would make the problem worse by …