Amazon Basin
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The Amazon Basin is the part of South America drained by the Amazon River and its branches. The basin is located mostly (54%) in Brazil, and is low-lying in relation to sea level.
The river has its origins high up in the Andes of Peru and Ecuador, but it is the lower part which is the basin. The river also has tributaries from Colombia, Venezuela and Bolivia. The South American rain forest of the Amazon is the largest in the world, covering about 8,235,430 km2 with dense tropical forest.
The Amazon Basin is one of the world's most precious ecosystems.