The Congo Basin in Central Africa contains the world's second largest tropical rainforest, covering around 3.3 million square kilometres across six countries. It is home to extraordinary biodiversity, regulates regional and global climate, and supports tens of millions of people — yet faces growing threats from logging, mining and agricultural expansion.
Where is the Congo Basin and what makes it special?
The Congo Basin is the drainage area of the Congo River and its tributaries in Central Africa. It spans the Democratic Republic of Congo (DRC), which holds the largest share, along with the Republic of Congo, Central African Republic, Cameroon, Gabon and Equatorial Guinea. The Congo River itself is the world's deepest river and the second largest by discharge (volume of water), after the Amazon.
What makes the Congo Basin exceptional is its combination of scale, isolation and ecological continuity. Unlike tropical forests in Southeast Asia, which are fragmented across islands, the Congo Basin forms a vast, largely continuous block of forest. Its position straddling the equator means it receives rainfall throughout the year from both the northern and southern hemisphere monsoon cycles, unlike the Amazon which has a more pronounced dry season. This continuous moisture means Congo forests are more resilient to seasonal drought than many other tropical forests.
What wildlife lives in the Congo Basin?
The Congo Basin is one of the world's most biodiverse regions, sheltering species found nowhere else on Earth.
| Species group | Notable examples |
|---|---|
| Great apes | Western lowland gorilla, eastern lowland gorilla, bonobo (found only in the DRC), chimpanzee |
| Elephants | African forest elephant (smaller than savanna elephant, with more rounded ears) |
| Large mammals | Okapi (a forest-dwelling relative of the giraffe, found only in DRC) |
| Birds | Over 1,000 species, including Congo peacock and many endemics |
| Fish | Over 700 fish species in the Congo River system; among the highest freshwater fish diversity on Earth |
| Reptiles and amphibians | Hundreds of endemic species |
| Plants | Tens of thousands of plant species, including many undescribed by science |
The bonobo — one of humans' two closest living relatives, along with the chimpanzee — is found only in the rainforests south of the Congo River. Its survival depends entirely on the integrity of the Congo Basin forest.
What ecosystem services does the Congo rainforest provide?
Ecosystem services are the benefits that natural systems provide to people.
- Carbon storage: the Congo Basin forests store enormous quantities of carbon — estimated at around 25–30 billion tonnes of carbon. When forests are cleared, this carbon is released as CO₂, contributing to climate change. The peatlands of the Cuvette Centrale in the DRC and Republic of Congo alone store an estimated 30 billion tonnes of carbon — discovered only in 2017 — and could release catastrophic amounts if drained or burned.
- Rainfall recycling: tropical forests recycle rainfall through evapotranspiration (the process by which trees absorb water through their roots and release it as water vapour through their leaves). This moisture rises, condenses and falls again as rain, maintaining rainfall patterns both locally and, via atmospheric circulation, in regions far from the forest. Deforestation in the Congo Basin would reduce rainfall across a much wider area of Africa.
- Freshwater supply: the Congo River system supplies freshwater to tens of millions of people in Central Africa for drinking, cooking, agriculture and fishing.
- Livelihoods: around 75 million people live in and around the Congo Basin and depend on the forest for food, medicine, building materials and income. Indigenous communities such as the Baka and Aka have lived sustainably in the forest for thousands of years.
What threatens the Congo Basin rainforest?
The Congo Basin forest is currently less degraded than the Amazon, but deforestation is accelerating.
Subsistence farming (small-scale agriculture): most deforestation in the Congo Basin is caused not by large commercial operations but by small-scale farmers clearing land to grow food. With a rapidly growing population and widespread poverty, millions of households have no alternative to cutting and burning forest to create agricultural land. This "shifting cultivation" pattern, where farmers move to new forest after soil fertility declines, is the leading driver of forest loss.
Commercial logging: legal and illegal logging removes valuable hardwoods. International demand for tropical timber sustains commercial logging operations that build roads into previously inaccessible forest — roads that then allow further agricultural encroachment.
Mining: the DRC holds extraordinary mineral wealth — including coltan (used in electronic devices), cobalt (critical for EV batteries), gold and diamonds. Mining operations destroy forest habitat and pollute rivers. The DRC's cobalt deposits, among the world's largest, face growing extraction pressure from global demand for electric vehicles.
Charcoal production: urban populations in Central Africa rely on charcoal for cooking fuel. Supplying major cities such as Kinshasa and Lubumbashi drives large-scale forest clearance.
Conflict and governance: decades of armed conflict in the DRC have made it extremely difficult to enforce environmental regulations. The combination of poverty, weak governance and ongoing conflict creates conditions in which forest protection is nearly impossible.
Frequently asked questions
How does the Congo Basin compare with the Amazon rainforest?
The Amazon is considerably larger — around 5.5 million square kilometres compared with the Congo Basin's 3.3 million. Both are crucial carbon stores and biodiversity hotspots. The Amazon has experienced more rapid and extensive deforestation: it has lost approximately 20% of its original area, while the Congo Basin has lost a smaller proportion — around 8–10% of its original forest. However, deforestation rates in the Congo Basin are accelerating. Both forests perform similar global climate functions, making their preservation a matter of international concern, not just national policy.
Why is the Congo peatland discovery significant?
In 2017, scientists discovered the world's largest tropical peatland in the Cuvette Centrale of the Congo Basin — a wetland covering around 145,000 square kilometres, mainly in the DRC and Republic of Congo. Peatlands form over thousands of years as waterlogged conditions slow the decomposition of dead plant material, which accumulates as peat. The carbon stored in these peatlands — about 30 billion tonnes — is roughly equivalent to 20 years of current global fossil fuel emissions. If drained or burned, this carbon would be released rapidly, making Congo peatland preservation one of the most important climate priorities on Earth.
What is being done to protect the Congo Basin?
The Congo Basin Forest Partnership, involving governments, NGOs and international organisations, supports forest monitoring, protected area management and community forestry programmes. The DRC and several other basin countries have expanded formal protected areas. International payments for ecosystem services — where wealthier countries pay forest nations to maintain forests as carbon sinks — are gaining traction through mechanisms like REDD+ (Reducing Emissions from Deforestation and Forest Degradation). However, funding remains inadequate relative to the scale of the challenge, and poverty reduction remains the most fundamental requirement for reducing subsistence-driven deforestation.
How do indigenous people use the Congo rainforest sustainably?
Indigenous communities such as the Baka, Aka, Bagyeli and others have lived in the Congo Basin for at least 5,000 years, developing deep knowledge of forest plants, animals and ecology. Their land use — gathering wild foods, small-scale hunting, minimal cultivation — is broadly sustainable and does not cause permanent forest clearance. Research consistently shows that forests under indigenous stewardship retain higher biodiversity and carbon stores than forests under other forms of management. Securing indigenous land rights is therefore recognised as one of the most effective forest conservation strategies, though in practice indigenous communities are often among the least protected by law.
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