Arab–Israeli peace projects regional problems of acute shortage of clean fresh water in Jordan, and the rapid contraction of the Dead Sea. A new desalination plant to be built near the Jordanian tourist resort of Aqaba would convert salt water from the Red Sea into fresh water for use in southern Israel and southern Jordan; each region would get eight billion to 13 billion gallons a year. This process would produces about as much brine as a waste product; the brine would be piped more than 100 miles to help replenish the Dead Sea, already known for its high salt content. This would
Fresh water balance and therefore can only live within a narrow range of salinity, diadromous fish have the ability to migrate between fresh water and saline water bodies. During these migrations they undergo changes to adapt to the surroundings of the changed salinities; these processes are hormonally controlled. The eel ("Anguilla anguilla") uses the hormone prolactin, while in salmon ("Salmo salar") the hormone cortisol plays a key role during this process. Many sea birds have special glands at the base of the bill through which excess salt is excreted. Similarly the marine iguanas on the Galápagos Islands excrete excess salt through a