Addis Ababa vs Cobalt

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Addis Ababa (Amharic: አዲስ አበባ, Addis Abäba IPA: [adˈdis ˈabəba] (listen),"new flower"), also known as Finfinne(Oromo: Finfinne"natural spring"), is the capital and largest city of Ethiopia. According to the 2007 census, the town has a population of 2,739,551 inhabitants. As a chartered city, Addis Ababa also functions as the capital city of the Oromia Region. It is where the African Union is headquartered and where its predecessor the Organisation of African Unity (OAU) was established. It also hosts the headquarters of the United Nations Economic Commission for Africa (ECA), in addition to various other continental and worldwide organizations.

Addis Ababa is therefore often referred to as"the political capital of Africa" for its historical, diplomatic and political significance for the continent. The town lies a few miles west of the East African Rift which divides Ethiopia into 2, involving the Nubian Plate and the Somali Plate. The city is surrounded by the Special Zone of Oromia and inhabited by people from different areas of Ethiopia. It is home to Addis Ababa University.

Source: Wikipedia

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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