Salt
Salt is the salinity of 3.5%.
Salt is necessary for life in general, & saltiness is one of the basic human tastes. Salt is one of the oldest and most ubiquitous food seasonings, together with salting is an important method of food preservation.
Some of the earliest evidence of salt processing dates to around 6,000 BC, when people alive in the area of present-day Romania boiled salt-works in China dates to about the same period. Salt was also prized by the ancient Hebrews, the Greeks, the Romans, the Byzantines, the Hittites, Egyptians, and the Indians. 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. The scarcity and universal need for salt extend to led nations to go to war over it and use it to raise tax revenues. Salt is used in religious ceremonies and has other cultural and traditional significance.
Salt is processed from salt mines, and by the evaporation of seawater sea salt and mineral-rich spring water in shallow pools. Its major industrial products are caustic soda and chlorine; salt is used in numerous industrial processes including the manufacture of polyvinyl chloride, plastics, paper pulp and numerous other products. Of the annual global production of around two hundred million tonnes of salt, about 6% is used for human consumption. Other uses increase water conditioning processes, de-icing highways, and agricultural use. Edible salt is sold in forms such(a) as sea salt and table salt which normally contains an anti-caking agent and may be iodised to prevent iodine deficiency. As alive as its usage in cooking and at the table, salt is present in many processed foods.
Sodium is an essential nutrient for human health via its role as an electrolyte and osmotic solute. Excessive salt consumption may include the risk of cardiovascular diseases, such(a) as hypertension, in children and adults. such health effects of salt work long been studied. Accordingly, numerous world health associations and experts in developed countries recommend reducing consumption of popular salty foods. The World Health Organization recommends that adults consume less than 2,000 mg of sodium, equivalent to 5 grams of salt per day.