Venezuela (ˌvɛnəˈzweɪlə ; beneˈswela), officially the Bolivarian Republic of Venezuela (República Bolivariana de Venezuela), is a country on the northern coast of South America, consisting of a continental landmass and many islands and islets in the Caribbean Sea. It has a territorial extension of , and its population was estimated at 29 million in 2022. The capital and largest urban agglomeration is the city of Caracas.
The continental territory is bordered on the north by the Caribbean Sea and the Atlantic Ocean, on the west by Colombia, Brazil on the south, Trinidad and Tobago to the north-east and on the east by Guyana. The Venezuelan government maintains a claim against Guyana to Guayana Esequiba. Venezuela is a federal presidential republic consisting of 23 states, the Capital District and federal dependencies covering Venezuela's offshore islands. Venezuela is among the most urbanized countries in Latin America; the vast majority of Venezuelans live in the cities of the north and in the capital.
The territory of Venezuela was colonized by Spain in 1522 amid resistance from indigenous peoples. In 1811, it became one of the first Spanish-American territories to declare independence from the Spanish and to form part, as a department, of the first federal Republic of Colombia (historiographically known as Gran Colombia). It separated as a full sovereign country in 1830. During the 19th century, Venezuela suffered political turmoil and autocracy, remaining dominated by regional military dictators until the mid-20th century. Since 1958, the country has had a series of democratic governments, as an exception where most of the region was ruled by military dictatorships, and the period was characterized by economic prosperity. Economic shocks in the 1980s and 1990s led to major political crises and widespread social unrest, including the deadly Caracazo riots of 1989, two attempted coups in 1992, and the impeachment of a President for embezzlement of public funds charges in 1993.
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Argentina (aɾxenˈtina), officially the Argentine Republic (República Argentina), is a country in the southern half of South America. Argentina covers an area of , making it the second-largest country in South America after Brazil, the fourth-largest country in the Americas, and the eighth-largest country in the world. It shares the bulk of the Southern Cone with Chile to the west, and is also bordered by Bolivia and Paraguay to the north, Brazil to the northeast, Uruguay and the South Atlantic Ocean to the east, and the Drake Passage to the south.
The Indigenous peoples of the Americas are the inhabitants of the Americas who have occupied parts of the Western Hemisphere since prior to arrival of European settlers in the 15th century. Indigenous cultures vary by language, culture, social practices, and geography. Some Indigenous peoples in the Americas have historically been hunter-gatherers, while others traditionally practice agriculture and aquaculture.
The Caribbean (ˌkærᵻˈbiːən,_kəˈrɪbiən , ˈkærɪbiæn ; el Caribe; les Caraïbes; de Caraïben) is a subregion of the Americas that includes the Caribbean Sea and its islands, some of which are surrounded by the Caribbean Sea and some of which border both the Caribbean Sea and the North Atlantic Ocean; the nearby coastal areas on the mainland are often also included in the region. The region is southeast of the Gulf of Mexico and the North American mainland, east of Central America, and north of South America.
Cu-based bimetallic catalysts have attracted great attention for the reverse water gas shift (RWGS) reaction due to their high activity and selectivity. This work reports the application of Cu-In bimetallic catalysts for the RWGS reaction and demonstrates ...
AMER CHEMICAL SOC2022
Hanoï, qui signifie en vietnamien “entre les fleuves”, a toujours été en perpétuel développement entre les eaux. La ville se situe à l’extrémité du delta du fleuve Rouge, territoire remodelé par l’homme depuis des millénaires afin de pouvoir l’habiter. Auj ...
A l’heure actuelle, les nouvelles technologies transforment la recherche et la pratique en matière de biodiversité et, par conséquent, aussi la surveillance de la diversité biologique. en particulier la collecte de données de télédétection et de données pa ...