Рондония: География, История и Экология штата Бразилии.

State in western Brazil
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Rondônia is one of the 26 states of Brazil, located in the northern subdivision of the country (central western part) between latitudes 07º 58' 32" and 13º 41' 36" S and longitudes 59º 46' 26" and 66º 48' 21"W. To the west is a short border with the state of Acre for 22 km, to the north is the state of Amazonas for about 930 km across the Serra de São Jão, latitude 7° 58ˈ south, and north of the Mapiri Madeira River, in the east is Mato Grosso for about 820 km across the Serra Grande, Serra de Providência and the Rio Branco, Inue (Languiaru) and Tenente Marques Eugênia, and in the south and southwest is Bolivia for 1,464 km across the Guaporé and Abuna Rivers. Rondônia has a population of 1,815,000 as of 2021. It is the fifth least populated state. Its capital and largest city is Porto Velho, bathed by the Madeira River. The state was named after Cândido Rondon, who explored the north of the country during the 1910s. The state, which is home to c. 0.7% of the Brazilian population, is responsible for c. 0.3% of the Brazilian GDP. The state has 52 municipalities and occupies an area of 237,590.547 km2, equivalent to the territory of Romania and almost five times larger than Croatia. In addition to this, there are other important cities such as Ariquemes, Cacoal, Guajará Mirim, Ji Paraná, Rolim de Moura and Vilhena.

Rondonia used to be home to over 200,000 km2 of rainforest, but has become one of the most deforested places in the Amazon. By 2003 around 70,000 km2 of rainforest had been cleared. The area around the Guaporé River is part of the Beni savanna ecoregion. The Samuel Dam is located in the state, on the Jamari River.

The Spaniard Ñuflo de Chávez was the first European explorer to reach the valley of the Guaporé River between 1541 and 1542, although he only passed through. Bandeirantes arrived in the region around 1650, with the goal of exploiting the gold and other minerals of the territory. In the same period, Jesuit priests came to the region and founded the first village. As a consequence of the discovery of gold on the right bank of the Guaporé River, the Portuguese Crown founded the Captaincy of Mato Grosso in 1748 with Antonio Rolim de Moura Tavares [pt] as governor. On March 19, 1752, the governor designated Vila Bela da Santíssima Trindade as the capital, from where he commanded the border demarcation following the Treaty of Madrid (1750). In 1753, he installed a surveillance post in the village of Santa Rosa Velha, built by the Spanish on the right bank of the Guaporé, and thus in Brazilian lands. In 1759, the Spanish governor of Santa Cruz de la Sierra requested that the post be evacuated. Instead, Rolim de Moura built a fort to replace it, which became known as the Forte de Bragança [pt]. Due to the climate and the incursions of the Spanish, the Presidio was soon in ruins. It was rebuilt in 1769 by Governor Luís Pinto de Sousa Coutinho, and renamed as Forte de Bragança. Ruined again, in 1776 the Forte Príncipe da Beira was built in its place. In 1772, Francisco de Melo Palheta [pt] led an expedition from Belém which reached the Madeira River, the Mamoré River and the Guaporé River, reaching Santa Cruz de la Sierra. The decline of mining and the proclamation of the First Brazilian Republic caused the region to lose its economic importance until the end of the nineteenth century, when the exploitation of rubber entered its peak.

In April 1878, following to the Treaty of Ayacucho, the border between Bolivia and Brazil was mapped by cartographic teams and agreed in 1879. The Treaty of Petrópolis in 1903 led to the construction of the Madeira Mamoré Railroad, leading to increased settlement. Decree Law No. 5812 (13 of September 1943) established the Federal Territory of Guaporé [pt] was created from parts of the states of Amazonas and Mato Grosso. By the law of February 17 1956, the region became known as the Federal Territory of Rondônia, in honor of Marshal Cândido Rondon. The exploitation of brazil nuts and rubber was the main economic activity until the discovery of cassiterite deposits, which accelerated the development and settlement of the region. This development led to the territory achieving the status of a state in 1982, with 13 constituent municipalities, including the capital, Porto Velho. These are: Guajará Mirim, Ji Paraná, Vilhena, Ariquemes, Jaru, Pimenta Bueno, Colorado do Oeste, Cacoal, Ouro Preto do Oeste, Presidente Médici, Espigão d'Oeste and Costa Marques.

It is the third most populous state in the North Region with 1,815,278 inhabitants, according to an estimate by IBGE for 2021, being surpassed only by Pará and Amazonas. The population density was 6.6 inhabitants/km2. Urbanization: 66.8% (2004); Population growth: 2.2% (1991 2000); Houses: 430,747 (2005). Four of its municipalities have a population above 100,000 inhabitants, these being Porto Velho, Ji Paraná, Ariquemes and Vilhena. The 2022 census revealed the following numbers: 936,708 Brown (Multiracial) people (59.2%), 486,123 White people (30.7%), 136,793 Black people (8.7%), 17,278 Amerindian people (1.1%), 4,257 Asian people (0.3%). The population of Rondônia is one of the most diverse in Brazil, composed of migrants from all regions of the country, among whom stand out the Paraná, São Paulo, Minas Gerais, and Rio Grande do Sul, who settled in the capital, still preserving the strong Amazonian traits of the native population in cities bathed by large rivers, especially in Porto Velho and Guajará Mirim, the two oldest cities in the state.

47.6% Roman Catholic in the Archdiocese of Porto Velho (1925 as a Territorial Prelature) with 30 parishes under Archbishop Roque Paloschi (2015), and the two suffragan dioceses of Guajará Mirim (1929 as a Territorial Prelature) with 13 parishes under Bishop Benedito Araújo (2011), and Ji Paraná (1978 as the Territorial Prelature of Vila Rondônia) with 24 parishes under Bishop Norbert Hans Christoph Foerster (2020); 33.8% Protestant, 0.6% Spiritism, 3.7% other religion, 14.3% non religious.

The economy of the state of Rondônia has, as main activities, agriculture, livestock, food industry and vegetal and mineral extraction. In 2016, the state's GDP reached R$ 39.451 billion. Its export basket is mainly composed of frozen beef (43.43%), soy (32.77%), raw tin (7.08%), sawn wood (2.36%) and edible giblets (2.02%). Beginning in the 1970s, the state attracted farmers from the south central part of the country, stimulated by the federal government's colonization projects and the availability of cheap and fertile land. The development of agricultural activities has transformed the area into one of the main agricultural frontiers in the country and one of the most prosperous and productive regions in northern Brazil. The state stands out in the production of coffee (largest producer in the North and 5th largest in Brazil), cocoa (2nd largest producer in the North and 3rd largest in Brazil), beans (2nd largest producer in the North), maize (2nd largest producer in the North region), soybean (3rd largest producer in the North region), rice (3rd largest producer in the North region) and cassava (4th largest producer in the North region). Despite the large volume of production and the small territory by the region's standards (7 times smaller than Amazonas and 6 times smaller than Pará), Rondônia still has more than 60% of its territory fully preserved. In coffee production, Rondônia was, in 2019, the 5th largest producer in the country, being the 2nd largest producer of Coffea canephora, getting a total of 2.3 million bags of 60 kg of coffee (near 138 thousand tons) this year. In soy, in the 2019 Brazilian harvest, Rondônia harvested 1.2 million tons, 3rd in the North Region. In 2019, the state produced 805 thousand tons of maize, second largest production in the northern region, losing only to Tocantins. In cassava production, Brazil produced a total of 17.6 million tons in 2018. Rondônia was the 11th largest producer in the country, with 583 thousand tons. In 2018, Rondônia produced 124 thousand tons of rice. In the production of cocoa, Pará has been competing with Bahia for the leadership of Brazilian production. In 2019, Pará harvested 135 thousand tons of cocoa, and Bahians harvested 130 thousand tons. Rondônia is the 3rd largest cocoa producer in the country, with 18 thousand tons harvested in 2017. In 2017, the state had a cattle herd of 14,098,031 head of cattle (73,37% for beef and the rest for dairy), second largest herd in the North, second only to Pará, being the 6th largest in the country, 5th in meat exports and 8th in milk production. The state's milk production in 2018 was around 800 million liters, the largest producer in the North. In 2017, Rondônia had 0.62% of the national mineral participation (8th place in the country). Rondônia had production of tin (10,9 thousand tons at a value of R$ 333 million), gold (1 ton at a value of R$ 125 million), niobium (in the form of columbita tantalita) (3.5 thousand tons at R$ 24 million), and zinc in gross form (26 thousand tons at R$ 27 million) In addition, in gemstones, the state has some production of garnet. In industry, Rondônia had an industrial GDP of R$ 8.2 billion in 2017, equivalent to 0.7% of the national industry. It employs 49,944 workers in the industry. The main industrial sectors are: Industrial Services of Public Utility, such as Electricity and Water (54.4%), Construction (19.2%), Food (17.6%), Wood (1.8%) and Non metallic minerals (1.2%). These 5 sectors concentrate 94.2% of the state's industry.

The quality of Education in Rondônia is considered the fourteenth best in the country, compared to other Brazilian states. In the list of Brazilian states by HDI, with data from 2010, the “Education” factor reached an index of 0.557, an increase of more than 67% compared to 2000, when the state reached only 0.345. According to the Brazilian Institute of Geography and Statistics (IBGE), in 2021 there were 244,815 enrollments in primary education in Rondônia.