Salt vs Kazan

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Salt is a mineral composed primarily of sodium chloride (NaCl), a chemical compound belonging to the larger class of salts; salt in its natural form as a crystalline mineral is known as rock salt or halite. Salt is present in vast quantities in seawater, where it is the main mineral constituent. The open ocean has about 35 grams (1.2 oz) of solids per liter of sea water, a salinity of 3.5%. Salt is essential for life in general, and saltiness is one of the basic human tastes. Salt is one of the oldest and most ubiquitous food seasonings, and salting is an important method of food preservation. Some of the earliest evidence of salt processing dates to around 6,000 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. 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 have 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 many industrial processes including the manufacture of polyvinyl chloride, plastics, paper pulp and many other products. Of the annual global production of around two hundred million tonnes of salt, about 6% is used for human consumption. Other uses include water conditioning processes, de-icing highways, and agricultural use. Edible salt is sold in forms such as sea salt and table salt which usually contains an anti-caking agent and may be iodised to prevent iodine deficiency. As well as its use 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 increase the risk of cardiovascular diseases, such as hypertension, in children and adults. Such health effects of salt have 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 should consume less than 2,000 mg of sodium, equivalent to 5 grams of salt per day.

Source: Wikipedia

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Kazan (; Tatar: Казан; Russian: Каза́нь, IPA: [kɐˈzanʲ]), is the capital and largest city of the Republic of Tatarstan in Russia. The city lies at the confluence of the Volga and the Kazanka rivers, covering an area of 425.3 square kilometres (164.2 square miles), with a population of over 1.2 million residents, up to roughly 1.6 million residents in the urban agglomeration. Kazan is the fifth-largest city in Russia, and the most populous city on the Volga, as well as the Volga Federal District. Ancient Kazan was founded in the late 13th century by the Golden Horde. In 1438, Kazan became the capital of the Khanate of Kazan. In 1552, Kazan was captured by Ivan the Terrible and became a part of Russia. The city was seized and largely destroyed during Pugachev's Rebellion of 1773–75, but was later rebuilt during the reign of Catherine the Great.

In the following centuries, Kazan grew to become a major industrial, cultural and religious centre of Russia. In 1920, after the Russian SFSR became a part of the Soviet Union, Kazan became the capital of the Tatar ASSR. After the dissolution of the Soviet Union, Kazan stayed as the capital of the Republic of Tatarstan. Kazan is renowned for its vibrant mix of Tatar and Russian cultures. In 2015, 2.1 million tourists visited Kazan, and 1.5 million tourists visited the Kazan Kremlin, a World Heritage Site. In April 2009, the Russian Patent Office granted Kazan the right to brand itself as the "Third Capital of Russia". In 2009 it was chosen as the "Sports capital of Russia", and it still is referred to as such. Kazan hosted the 2013 Summer Universiade, and was one of the host cities of the 2018 FIFA World Cup.

Source: Wikipedia