Brasília vs Cobalt

Informations

Brasília (; Portuguese: [bɾaˈziljɐ]) is the federal capital of Brazil and seat of government of the Federal District. The city is located on top of the Brazilian highlands in the country's center-western region. It was established by President Juscelino Kubitschek on April 21, 1960, to serve as the new national capital. Brasília is estimated to be Brazil's third-most populous town. Among major Latin American cities, it has the highest GDP per capita.Brasília was a planned city developed by Lúcio Costa, Oscar Niemeyer and Joaquim Cardozo in 1956 at a strategy to move the capital from Rio de Janeiro to a more central site. The landscape architect was Roberto Burle Marx. The city's design divides it into numbered blocks as well as sectors for specified activities, such as the Hotel Sector, the Banking Sector, and the Embassy Sector. Brasília was inscribed as a UNESCO World Heritage Site in 1987 because of its modernist architecture and distinctively artistic urban planning. It was called"City of Design" by UNESCO in October 2017 and continues to be a part of the Creative Cities Network since then.

All three branches of Brazil's federal government are based in the city: executive, legislative and judiciary. Brasília also hosts 124 overseas embassies. The city's international airport connects it to all other major Brazilian cities and some international destinations, and it's the third-busiest airport in Brazil. It was one of the main host cities of the 2014 FIFA World Cup and hosted a number of the soccer matches during the 2016 Summer Olympics; it also hosted the 2013 FIFA Confederations Cup. The city has a special status in Brazil, as it's an administrative division rather than a legal municipality like other cities in Brazil. Although Brasília is used as a synonym for the Federal District through synecdoche, the Federal District consists of 31 administrative regions, only one of which is the area of the originally planned town, also known as Plano Piloto. The remainder of the Federal District is considered by IBGE to constitute Brasília's metro area.

Source: Wikipedia

Informations

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