The largest rainforest in the world is the Amazon Rainforest, which spans across several countries in South America, including Brazil, Peru, and Colombia. Covering approximately 5.5 million square kilometers, it is known for its incredible biodiversity, housing millions of species of plants, animals, and insects, many of which are not found anywhere else on Earth. The Amazon plays a crucial role in regulating the global climate by absorbing carbon dioxide and producing oxygen. It is also vital for indigenous peoples who have lived sustainably in the forest for centuries. However, the rainforest faces significant threats from deforestation and climate change.