Dead Sea on the Israeli side allows production of magnesium metal (by a subsidiary, Dead Sea Magnesium Ltd.). Due to the popularity of the sea's therapeutic and healing properties, several companies have also shown interest in the manufacturing and supplying of Dead Sea salts as raw materials for body and skin care products. Since 1930, when its surface was and its level was below sea level, the Dead Sea has been monitored continuously. In recent decades, the Dead Sea has been rapidly shrinking because of diversion of incoming water from the Jordan River to the north. The southern end is fed by
River Hertford River Hertford The River Hertford is a river in Yorkshire in the north of England. It is part of the River Derwent catchment area. The River Hertford starts close to Muston near the seaside town of Filey. Despite being only from the North Sea (to its eastern side) the river flows westwards for into the River Derwent at Haybridge. It is sometimes referred to as a 'Backward River' because it flows away from the sea. Ekwall suggests the name derives from a ford over the river, which became the name by back formation. Star Carr, a Mesolithic archaeological site, lies