The Amazon Rainforest

The Amazon rainforest, often referred to as the "lungs of the Earth," is the world's largest tropical rainforest, covering over 5.5 million square kilometers across nine countries in South America. Brazil contains approximately 60% of the rainforest.

Biodiversity:
The Amazon is home to an estimated 10% of all species on Earth, including:
- Over 40,000 plant species
- 1,300 bird species
- 3,000 types of fish
- 430 mammal species
- Countless insects and reptiles

The Amazon River is the largest river in the world by water volume, discharging about 20% of all fresh water flowing into the world's oceans.

Importance to Climate:
The Amazon absorbs vast quantities of CO₂ and produces oxygen, making it a critical carbon sink. It also generates rain through a process called "flying rivers" — moisture released by trees that travels across the continent.

Threats:
- Deforestation for agriculture (soy, cattle ranching) and logging.
- Mining for gold, iron ore, and other minerals.
- Infrastructure development (roads, dams).
- Climate change-induced droughts.

The Amazon has lost approximately 17% of its original forest cover, and scientists warn that approaching a tipping point (around 20–25% deforestation) could trigger a permanent change to a dry savanna ecosystem.