The Arab countries cover ten percent of the world’s total land area and are home to 6% of the world's population, nevertheless they receive less than 2% of the world’s renewable water supply. With rapid population growth since the mid-1970s, this has caused dramatic contraction in per capita renewable water resources, from an average of 2,925 cubic meters per year in 1962 to 1,180 in 1992 and further to an alarming 743 in 2011, below...