Volta Redonda vs Gelsenkirchen

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Volta Redonda (Portuguese pronunciation: [ˈvɔwtɐ ʁeˈdõdɐ]) is the name of a municipality in the Rio de Janeiro state of Brazil with an area of 182.81 km², located from 350m to 707m above the sea level (22º31'23" S, 44º06'15" W) and with a population of 259,811 inhabitants (estimated in 2009). The area around the city has nearly 700,000 km². Its name (which is Portuguese for Round Turn) is due to the round shape of a curve in the Paraíba do Sul river around which the city was built. Situated in Volta Redonda is Companhia Siderurgica Nacional (CSN), Brazil's second largest steel producer. Today its economy, despite still being based on industry, is quite diverse, and largely focused on the areas of services and trade. Due to this, Volta Redonda is worldly known as Cidade do Aço (which is Portuguese for Steel City).

The city borders with the municipalities of Barra Mansa (north, northwest, west and southwest), Barra do Piraí (northeast), Pinheiral, Piraí (south and east), and Rio Claro (south) and is 130 km from the city of Rio de Janeiro. Along with the municipalities of Barra Mansa and Pinheiral, it is a conurbation of over 500,000 inhabitants, according to the IBGE estimates for 2008, and the state's largest urban spot outside the metropolitan region of Rio de Janeiro. Economical center of the South Fluminense region, Volta Redonda is a strategic area, close to major hub cities in other regional states, such as Juiz de Fora (190 kilometers) and Sao Jose dos Campos (220 kilometers).

Source: Wikipedia

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Gelsenkirchen (UK: , US: , German: [ˌɡɛlzn̩ˈkɪʁçn̩] (listen); Westphalian: Gelsenkiärken) is the 11th largest city of Germany's most populous federal state of North Rhine-Westphalia and its 262,528 (2016) inhabitants make it the 25th largest city of Germany. On the Emscher River (a tributary of the Rhine), it lies at the centre of the Ruhr, the largest urban area of Germany, of which it is the fifth largest city after Dortmund, Essen, Duisburg and Bochum. The Ruhr is located in the Rhine-Ruhr Metropolitan Region, one of Europe's largest urban areas. Gelsenkirchen is the fifth largest city of Westphalia after Dortmund, Bochum, Bielefeld and Münster, and it is one of the southernmost cities in the Low German dialect area. The city is home to the football club Schalke 04, which is named after Gelsenkirchen-Schalke. The club's current stadium Veltins-Arena, however, is located in Gelsenkirchen-Erle. Gelsenkirchen was first documented in 1150, but it remained a tiny village until the 19th century, when the Industrial Revolution led to the growth of the entire area.

In 1840, when the mining of coal began, 6,000 inhabitants lived in Gelsenkirchen; in 1900 the population had increased to 138,000. In the early 20th century, Gelsenkirchen was the most important coal mining town in Europe. It was called the "city of a thousand fires" for the flames of mine gases flaring at night. In 1928, Gelsenkirchen was merged with the adjoining cities of Buer and Gelsenkirchen-Horst. The city bore the name Gelsenkirchen-Buer, until it was renamed Gelsenkirchen in 1930. During the Nazi era Gelsenkirchen remained a centre of coal production and oil refining, and for this reason it was bombed in Allied air raids during World War II. There are no longer colliers in Gelsenkirchen with the city searching for a new image, having been hit for decades with one of the highest unemployment rates in Germany. Today Germany's largest solar power plant is located in the city. In Gelsenkirchen-Scholven there is a coal-fired power station with the tallest chimneys in Germany (302 m).

Source: Wikipedia