<human>:  What are some facts about the Amazon Rainforest?
<bot>: 
1. The Amazon Rainforest covers an area of approximately 
5.5 million square kilometers, making it the largest tropical rainforest in the world.
2. It is home to an estimated 390 billion individual trees, and is estimated to contain 10 percent of the world's known biodiversity.
3. The Amazon Rainforest produces more than 20% of the world's oxygen and is a major source of carbon dioxide absorption.
4. It is home to a large variety of indigenous tribes, whose traditional lifestyles continue to rely heavily on the forest's resources.
5. The Amazon Rainforest has been cut down at an alarming rate due to logging and agricultural burning, leading to significant levels of deforestation.