Cobalt vs Nurmijärvi

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Cobalt is a chemical element with the symbol Co and atomic number 27. Like nickel, cobalt is found in the Earth's crust only in chemically combined form, save for small deposits found in alloys of natural meteoric iron. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal. Cobalt-based blue pigments (cobalt blue) have been used since ancient times for jewelry and paints, and to impart a distinctive blue tint to glass, but the color was later thought to be due to the known metal bismuth. Miners had long used the name kobold ore (German for goblin ore) for some of the blue-pigment-producing minerals; they were so named because they were poor in known metals, and gave poisonous arsenic-containing fumes when smelted. In 1735, such ores were found to be reducible to a new metal (the first discovered since ancient times), and this was ultimately named for the kobold. Today, some cobalt is produced specifically from one of a number of metallic-lustered ores, such as cobaltite (CoAsS). The element is, however, more usually produced as a by-product of copper and nickel mining.

The copper belt in the Democratic Republic of the Congo (DRC) and Zambia yields most of the global cobalt production. World production in 2016 was 116,000 metric tons (114,000 long tons; 128,000 short tons) (according to Natural Resources Canada), and the DRC alone accounted for more than 50%.Cobalt is primarily used in lithium-ion batteries, and in the manufacture of magnetic, wear-resistant and high-strength alloys. The compounds cobalt silicate and cobalt(II) aluminate (CoAl2O4, cobalt blue) give a distinctive deep blue color to glass, ceramics, inks, paints and varnishes. Cobalt occurs naturally as only one stable isotope, cobalt-59. Cobalt-60 is a commercially important radioisotope, used as a radioactive tracer and for the production of high-energy gamma rays. Cobalt is the active center of a group of coenzymes called cobalamins. Vitamin B12, the best-known example of the type, is an essential vitamin for all animals. Cobalt in inorganic form is also a micronutrient for bacteria, algae, and fungi.

Source: Wikipedia

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Nurmijärvi (Finnish pronunciation: [ˈnurmiˌjærʋi]) is the most populated rural municipality of Finland, located 37 kilometres (23 mi) north of the capital Helsinki. The neighboring municipalities of Nurmijärvi are Espoo, Vantaa, Tuusula, Hyvinkää and Vihti, and it is part of the Greater Helsinki. The population of the municipality is 43,403 inhabitants. In recent decades, it has been one of the fastest growing municipalities in the Greater Helsinki and also in whole Finland in terms of population; even the 2020 COVID-19 pandemic hasn't shown a slowdown in growth of population.The close proximity to Helsinki has led to a considerable growth of the major villages such as Klaukkala, Rajamäki and Röykkä. Klaukkala is the biggest built-up area of Nurmijärvi, which nowadays is considered a dormitory town of Helsinki.

The church village (Kirkonkylä) is the administrative centre of the municipality, although the clear emphasis on population growth is in Klaukkala. Nurmijärvi literally means "lawn lake" although the lake that gave the municipality its name was drained in the early 20th century and is now nothing more than some flat fields near the village centre. Nurmijärvi is one of three municipalities in the Uusimaa region that do not have a Swedish name; the others are Askola and Mäntsälä. Matti Vanhanen, former Prime Minister of Finland and current finance minister, lives in Lepsämä in Nurmijärvi.

Source: Wikipedia