The largest rain forest 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, the Amazon serves as a critical global ecosystem and is home to an unparalleled diversity of flora and fauna. It plays a vital role in regulating the Earth's climate by absorbing large amounts of carbon dioxide and generating oxygen. The rainforest is also essential for indigenous peoples, providing resources and cultural significance. However, it faces threats from deforestation and climate change, making conservation efforts increasingly urgent.