![]() ![]() Salt is used in religious ceremonies and has other cultural and traditional significance. The scarcity and universal need for salt have led nations to go to war over it and use it to raise tax revenues. ![]() Salt became an important article of trade and was transported by boat across the Mediterranean Sea, along specially built salt roads, and across the Sahara on camel caravans. Salt was also prized by the ancient Hebrews, Greeks, Romans, Byzantines, Hittites, Egyptians, and Indians. Some of the earliest evidence of salt processing dates to around 6000 BC, when people living in the area of present-day Romania boiled spring water to extract salts a salt-works in China dates to approximately the same period. Salting, brining, and pickling are also ancient and important methods of food preservation. Salt is one of the oldest and most ubiquitous food seasonings, and is known to uniformly improve the taste perception of food, including otherwise unpalatable food. Salt is essential for life in general, and saltiness is one of the basic human tastes. The open ocean has about 35 g (1.2 oz) of solids per liter of sea water, a salinity of 3.5%. Salt is present in vast quantities in seawater. Salt is a mineral composed primarily of sodium chloride (NaCl), a chemical compound belonging to the larger class of salts salt in the form of a natural crystalline mineral is known as rock salt or halite. Loading sea salt at an evaporation pond in Walvis Bay, Namibia halophile organisms give it a red colour. ![]()
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