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This will be the Arab world’s next battle

Guardian: Long after the political uprisings in the Middle East have subsided, many underlying challenges that are not now in the news will remain. Prominent among these are rapid population growth, spreading water shortages, and growing food insecurity. In some countries grain production is now falling as aquifers – underground water-bearing rocks – are depleted. After the Arab oil-export embargo of the 1970s, the Saudis realised that since they were heavily dependent on imported grain, they were vulnerable...