From “Second Lung of the Planet” to Climate Battleground: Science, Politics, and the Future of Central Africa’s Forests
Abstract
The Congo Basin rainforest, spanning six Central African countries, is increasingly recognized as one of the planet’s most important ecosystems for climate regulation. It stores vast amounts of carbon in trees and peatlands, influences regional rainfall, and has been described as the world’s most vital remaining tropical carbon sink. At the same time, research documents rising pressures from smallholder agriculture, logging, infrastructure, and proposed oil and gas expansion.
This article reviews recent scientific evidence on the Congo Basin’s carbon stocks, forest loss, and changing sink–source dynamics; explores its role in regional and global climate systems; and summarizes key debates among scholars, researchers, and critics regarding climate finance, fossil fuel development, and a “just transition” for the Democratic Republic of Congo (DRC) and neighboring states. Data from Global Forest Watch, Carbon Brief, UNEP, and recent peer-reviewed studies are synthesized in tables. The article concludes by highlighting governance gaps, climate justice claims, and priorities for research and policy.
Keywords: Congo Basin, tropical forests, peatlands, global warming, carbon sink, just transition, climate justice
1. Introduction
The Congo Basin rainforest—the world’s second-largest tropical forest after the Amazon—stretches across the Democratic Republic of Congo (DRC), Republic of Congo, Gabon, Cameroon, the Central African Republic, and Equatorial Guinea. The World Bank estimates that Congo Basin forests account for more than 10% of the global climate-regulation function of tropical forests and are among the most biodiverse on Earth.World Bank Blogs
Scientists and NGOs increasingly describe the region as the world’s most critical remaining tropical forest carbon sink, absorbing hundreds of millions of tonnes of CO₂ per year, potentially more than the Amazon.Global Witness+2Bloomberg+2 At the same time, deforestation, forest degradation, and climate impacts are eroding this function. An assessment from the London School of Economics notes that around 10% of Congo Basin forest area has been lost between 1990 and 2025, and that climate change may already be weakening the forests’ capacity to absorb CO₂.Londres École d’Économie
The Congo Basin is often called the “world’s second lung,” yet receives a fraction of the research attention and climate finance directed to the Amazon. A 2023 comparative study reported roughly 2,000 academic papers on the Congo Basin, versus over 10,000 on the Amazon, underscoring persistent knowledge gaps and the underrepresentation of African scientists.The Guardian
For accessible introductions, see the World Bank blog “Why Congo Basin forests can’t be ignored: a global lifeline at a crossroads” (worldbank.org) and Carbon Brief’s profile of the DRC (carbonbrief.org). World Bank Blogs+1
2. Carbon Stocks, Peatlands, and Sink–Source Dynamics
2.1 Forest Carbon and the “World’s Largest Tropical Carbon Sink”
The Congo Basin’s above-ground biomass stores vast amounts of carbon. Recent syntheses suggest that the region’s forests currently absorb around 600 million tonnes of CO₂ per year—equivalent to the annual emissions of Germany.Bloomberg+1 This has led some observers to call it the “biggest tropical carbon sink left on Earth.”Global Witness+1
Global Witness, for example, argues that protecting the Basin is critical for stabilizing the climate, noting that deforestation trends risk turning this carbon sink into a net source (globalwitness.org). Global Witness The Forest Declaration Assessment likewise warns that increased deforestation in 2021 put the region off-track for 2030 forest goals.Forest Declaration Assessment+1
2.2 Peatlands: A “Carbon Treasure Trove”
Beneath the trees lies an even more concentrated carbon store. In 2017, scientists discovered the world’s largest tropical peatland complex in the Cuvette Centrale (Lac Télé–Lac Tumba region), spanning roughly 145,000 km² and holding about 30 billion tonnes of carbon—equivalent to more than 15–20 years of current U.S. or global fossil-fuel emissions.Woodwell Climate+4Priestley Centre for Climate Futures+4The Guardian+4
The University of Leeds team emphasized that these peatlands cover only about 4% of the Basin but store roughly as much carbon belowground as all the above-ground forests combined.Priestley Centre for Climate Futures+1 UNEP’s Congo Basin peatlands initiative calls this area “one of the most carbon-rich ecosystems on Earth,” noting that its 30 billion tonnes of carbon equal roughly two years of global CO₂ emissions.(unepdhi.org). UNEP-DHI
Scholars and climate NGOs argue that disturbing these peatlands through drainage, logging roads, or oil and gas extraction could release enormous pulses of CO₂, undermining global climate goals.Climate Home News+3Carbon Brief+3Woodwell Climate+3
2.3 Emerging Evidence of Seasonal Carbon Sources
At the same time, new atmospheric analyses complicate the narrative of the Congo Basin as a simple, stable sink. A 2023 study in Earth and Space Science found that during the dry season the Basin behaves as a net carbon source, with enhanced biomass burning and reduced photosynthesis contributing to a net release of ~65 gC m⁻² over three dry-season months.Wiley Online Library+1
The authors stress that this seasonal source does not negate the Basin’s importance as an annual sink over longer periods, but it does reveal a growing asymmetry: warming, drought, and fire can erode sink strength and increase interannual variability.Wiley Online Library+2Bloomberg+2
3. Deforestation, Drivers, and Climate Feedbacks
3.1 Forest Loss Trends
Global Forest Watch data show that from 2001 to 2024, the DRC alone lost about 21 million hectares of tree cover—roughly 11% of its 2000 tree-cover area—emitting around 13 gigatonnes of CO₂-equivalents.Global Forest Watch+2Global Forest Watch+2 The Republic of Congo lost about 1.15 million hectares (4.4% of its 2000 tree cover), with 679 Mt CO₂e emissions.Global Forest Watch
A 2022 Forest Declaration regional assessment reported that while deforestation rates decreased slightly between 2015–2020, the Basin still lost 2.2 million hectares of forest in that period, and deforestation rose by 5% in 2021. Only Gabon and Republic of Congo are on track to meet 2030 forest goals; the Basin overall is not.Forest Declaration Assessment+2Forest Declaration Assessment+2
Global analyses further show that DRC has experienced consistently high primary-forest loss, with more than 500,000 hectares lost in 2022 alone, mostly in small clearings linked to shifting agriculture.gfr.wri.org
3.2 Drivers: Smallholder Agriculture vs Industrial Expansion
Contrary to narratives that focus solely on “industrial deforestation,” Global Forest Watch and World Resources Institute note that in the Congo Basin much of forest loss is currently due to smallholder agriculture—small clearings for subsistence crops that are later fallowed.gfr.wri.org+1
However, conservation biologists warn that this pattern is changing. A 2024 review in Biological Conservation highlights expanding industrial agriculture, logging, mining, dams, roads, and planned oil and gas projects as major threats to Congo Basin biodiversity and forest integrity.ScienceDirect
In addition, 2024–2025 fire data show that extreme droughts and fires driven by global warming are now a significant cause of forest loss in Congo Basin countries, alongside Brazil and Bolivia.The Guardian
3.3 Regional and Global Climate Feedbacks
The Basin’s forests recycle moisture and help generate rainfall across Central and West Africa. A recent Financial Times report summarized research showing that the Congo Basin supplies up to 83% of its own rainfall via evapotranspiration and influences monsoon patterns as far away as Ivory Coast and Ghana, with deforestation linked to declining rainfall and threatened cocoa yields.Financial Times+1
More broadly, a 2025 Nature Climate Change study estimated that deforestation across tropical regions—including the Congo Basin—has caused more than 500,000 heat-related deaths over the last 20 years by raising local temperatures, reducing rainfall, and increasing fire risk.The Guardian These findings underline that deforestation is both a global climate issue and a direct public-health threat for local communities.
4. Governance, Climate Finance, and Justice Debates
4.1 Global Pledges and Climate Finance
Congo Basin countries are signatories to the Glasgow Leaders’ Declaration on Forests and Land Use, which aims to halt and reverse forest loss by 2030, but progress remains uneven.Forest Declaration Assessment+1 International initiatives such as the Central African Forest Initiative (CAFI), REDD+ programs, and project-based climate finance deals aim to channel funds to forest protection.
Recent examples include Gabon’s “Project Finance for Permanence” deal to fund long-term protection of its Congo rainforest, combining domestic and donor resources.Reuters+1 UNEP and partners are also developing targeted finance for peatland protection in the Cuvette Centrale.UNEP-DHI+1
World Bank analysts argue that sustained, long-term investment is needed to support governance reforms, rural livelihoods, and monitoring systems, warning that short project cycles and fragmented funding are insufficient for a region of this scale.World Bank Blogs+1
4.2 Oil, Gas, and the “Just Transition”
The most contentious debate concerns whether DRC and neighbors should exploit oil and gas in forest and peatland areas. In 2022–2024, the DRC government auctioned dozens of oil and gas blocks, some overlapping peatlands and protected areas, arguing that resource revenues are needed to fight poverty and finance development.Carbon Brief+2Climate Home News+2
Civil society coalitions, however, issued strong statements opposing oil and gas extraction in the Basin, warning of catastrophic consequences for biodiversity, land rights, food security, and the global climate. A 2024 joint statement coordinated by BankTrack declared that such expansion would “have disastrous consequences for the lives of the Congolese people … as well as the fight against climate change” (banktrack.org). Banktrack
At COP30, Congolese civil society groups framed this conflict in terms of climate justice, insisting that a “truly just transition” must make DRC a solution “for and with its own people,” not just a carbon service provider for wealthy countries.Rainforest Foundation UK+2CENUA+2
European institutions have also urged DRC to avoid drilling in a designated “Green Corridor” of forests and peatlands, but critics in Africa point out the paradox of former colonial powers asking African states to “leave resources in the ground” while continuing to consume large amounts of fossil fuels.Climate Home News+2World Bank Blogs+2
Activists from 350Africa.org describe oil expansion in the heart of the Basin as a “direct betrayal of climate justice and of communities fighting for dignity and clean, renewable energy.”The Independent+2Banktrack+2
4.3 African Perspectives on a Just Transition
The UN Economic Commission for Africa’s report African Perspectives of a Just Transition to Low-Carbon Economies argues that African countries must balance global mitigation goals with urgent needs for energy access, industrialization, and poverty reduction.CENUA+1
Mongabay’s 2025 overview of “what does the just energy transition mean for Africa?” underscores that ~600 million Africans lack basic electricity, and calls for transitions that prioritize renewable energy access without imposing disproportionate costs on African societies.Mongabay
Scholars and policy analysts debate whether current climate-finance architectures (REDD+, debt-for-nature swaps, results-based payments) genuinely support structural transformation or mainly pay for marginal forest protection while leaving extractive political economies intact.World Bank Blogs+2Londres École d’Économie+2
5. Research Gaps and Epistemic Inequalities
A recurring theme in the literature is the relative neglect of the Congo Basin in global research. A 2023 analysis cited by The Guardian found roughly 2,000 academic papers on the Congo Basin compared with more than 10,600 on the Amazon, despite the Congo’s comparable importance for climate and biodiversity.The Guardian+1
This “knowledge gap” is not just about total publications; it also concerns whose knowledge counts. African scientists and local communities are underrepresented in high-impact climate and biodiversity research, even though they are closest to the ecosystems in question.The Guardian+1
Critics argue that addressing global warming through the Congo Basin requires not only more data but also more epistemic justice: investment in African universities, local monitoring institutions, community-based research, and knowledge co-production.Rainforest Foundation UK+3CENUA+3World Bank Blogs+3
6. Tables
Table 1
Key Climate-Relevant Metrics for the Congo Basin
| Indicator | Approximate Value | Notes / Source |
|---|---|---|
| Total forest area (Congo Basin countries combined) | ~240 million ha (est.) | Exact figures vary by source; Basin includes DRC, RoC, Gabon, Cameroon, CAR, Eq. Guinea.World Bank Blogs+1 |
| Share of global tropical forest climate-regulation function | >10% | Congo Basin forests provide over 10% of climate-regulation services of tropical forests worldwide.World Bank Blogs |
| Annual CO₂ absorption by Basin forests | ~600 Mt CO₂/year | Equivalent to Germany’s annual emissions.Bloomberg+1 |
| Carbon stored in Cuvette Centrale peatlands | ~30 billion tonnes | Largest tropical peatland complex; ≈ two years of global CO₂ emissions.Global Peatlands+3Priestley Centre for Climate Futures+3The Guardian+3 |
| DRC tree-cover loss (2001–2024) | 21 Mha (~11% of 2000 cover) | Emissions ≈ 13 Gt CO₂e.Global Forest Watch+1 |
| Republic of Congo tree-cover loss (2001–2024) | 1.15 Mha (~4.4% of 2000 cover) | Emissions ≈ 679 Mt CO₂e.Global Forest Watch |
| Forest loss trend (Basin-wide, 2015–2021) | 2.2 Mha lost 2015–2020; deforestation up 5% in 2021 | Region off-track for 2030 forest goals; only Gabon and RoC on track.Forest Declaration Assessment+1 |
| Forest area lost 1990–2025 (Basin) | ~10% | Despite slowing rates, cumulative loss significant; sink capacity at risk.Londres École d’Économie+1 |
Table 2
Selected Initiatives and Debates on Congo Basin Climate Governance
| Initiative / Actor | Main Objective(s) | Instruments / Finance | Key Critiques / Debates |
|---|---|---|---|
| Glasgow Leaders’ Declaration on Forests (2021) | Halt and reverse forest loss by 2030 | Political pledge; mobilize finance and partnerships | Deforestation still rising in Congo Basin; pledge not legally binding.Forest Declaration Assessment+1 |
| CAFI & REDD+ programs | Reward reduced deforestation and forest conservation | Results-based payments, technical assistance | Critics say funding volumes are small vs. opportunity costs; bureaucratic; weak local benefit-sharing.World Bank Blogs+1 |
| Gabon “Project Finance for Permanence” (PFP) | Long-term financing to protect Congo rainforest | Mix of donor funds and domestic contributions over 10+ years | Seen as a model, but questions remain about replicability and reliance on donor priorities.Reuters+1 |
| UNEP Congo Basin Peatlands Initiative | Protect peatlands as a global carbon store | International funding for peatland governance, mapping, livelihoods | Implementation challenges in remote, low-capacity areas; need for community rights recognition.UNEP-DHI+2Global Peatlands+2 |
| DRC oil & gas auctions | Generate revenue, support development | Licensing rounds in forest/peatland regions | Civil society denounces climate and social risks; EU and activists call for cancellation; gov’t cites right to development.Mongabay+3Banktrack+3Climate Home News+3 |
| African “Just Transition” frameworks (UNECA, NGOs) | Low-carbon development with energy access and jobs | Policy reports, advocacy for climate finance and technology transfer | Debate over whether current “just transition” rhetoric genuinely shifts power or repackages old conditionalities.CENUA+2Mongabay+2 |
7. Conclusions
Scientific evidence underscores that the Congo Basin is indispensable for stabilizing the global climate: its forests and peatlands store and absorb vast quantities of carbon, regulate rainfall across Central and West Africa, and buffer local populations against extreme heat. Yet those same populations live with high poverty rates, limited energy access, and weak infrastructure, while facing mounting deforestation, fire, and the prospect of fossil-fuel expansion.
Scholars and critics converge on several points:
- Protecting forests and peatlands is globally rational but locally complex. Any strategy must integrate land rights, livelihoods, and sovereignty, not simply treat the Basin as a carbon offset for high-emitting countries.Rainforest Foundation UK+2World Bank Blogs+2
- Climate justice requires rebalancing power and finance. Current climate-finance flows are inadequate and often shaped by donor priorities; African analysts call for a just transition that delivers energy access and industrialization alongside conservation.CENUA+2Mongabay+2
- The science is still evolving—and underfunded. More long-term monitoring, modeling, and social research are needed, particularly by African scientists, to understand changing sink–source dynamics and socio-ecological thresholds.The Guardian+2Wiley Online Library+2
Whether the Congo Basin remains a stabilizing force or becomes a major amplifier of global warming will depend on decisions made in the next decade—by governments in Kinshasa and Brazzaville, by communities in forest landscapes, and by policymakers in global climate negotiations.
8. Suggested Further Readings (with Weblinks)
- World Bank (2025). “Why Congo Basin forests can’t be ignored: A global lifeline at a crossroads.”
Overview of climate, biodiversity, and development stakes.
https://blogs.worldbank.org/en/africacan/why-congo-basin-forests-can-t-be-ignored-global-lifeline-at-crossroads World Bank Blogs - Carbon Brief (2024). “The Carbon Brief Profile: Democratic Republic of the Congo.”
Deep dive into DRC’s emissions, forests, energy, and climate policy.
https://interactive.carbonbrief.org/the-carbon-brief-profile-drc/index.html Carbon Brief - Jiang, X., et al. (2023). “Congo Basin Rainforest Is a Net Carbon Source During the Dry Season.” Earth and Space Science.
Open-access article on seasonal CO₂ fluxes.
https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2022EA002644 Wiley Online Library+1 - Dargie, G. C., et al. (2017). “The peatlands of the Congo Basin.” Nature. / University of Leeds summary.
Discovery of the world’s largest tropical peatland complex.
Leeds summary: https://climate.leeds.ac.uk/news/scientists-discover-worlds-largest-tropical-peatland-in-remote-congo-swamps/ Priestley Centre for Climate Futures+1 - Global Forest Watch – Deforestation dashboards for DRC and Republic of Congo.
Interactive data on forest loss, drivers, and emissions.
https://www.globalforestwatch.org/dashboards/country/COD/
https://www.globalforestwatch.org/dashboards/country/COG/ Global Forest Watch+2Global Forest Watch+2 - Forest Declaration Assessment (2022). “Tracking progress towards forest goals in the Congo Basin.”
Regional assessment of deforestation trends and policy responses.
https://forestdeclaration.org/wp-content/uploads/2022/11/2022RegionalAssessment_ENG.pdf Forest Declaration Assessment+1 - UNEP-DHI (2025). “Protecting the Congo Basin peatlands.”
Project overview for peatland conservation and sustainable development.
https://unepdhi.org/protecting-the-congo-basin-peatlands/ UNEP-DHI+1 - UNECA (2024). African Perspectives of a Just Transition to Low-Carbon Economies (Summary for Policymakers).
African framing of just transition, including Congo Basin issues.
https://uneca.org/sites/default/files/ACPC/2024/African_perspectives_of_a_just_transition_to_Low_Carbon_economies.pdf CENUA - Rainforest Foundation UK (2025). “COP30: Congolese Civil Society Calls for a Truly Just Transition in the DRC.”
Civil society statement on oil, forests, and justice.
https://www.rainforestfoundationuk.org/cop30-congolese-civil-society-calls-for-a-truly-just-transition-in-the-drc/ Rainforest Foundation UK - Beekmann, M., et al. (2024). “Uncertain future for Congo Basin biodiversity.” Biological Conservation.
Peer-reviewed review of threats to biodiversity and forests.
(Abstract via ScienceDirect) https://www.sciencedirect.com/science/article/pii/S0006320724002921 ScienceDirect
9. Sample APA-Style References (Selected)
Format according to APA 7th edition; this is an illustrative subset for a full reference list.
Beekmann, M., et al. (2024). Uncertain future for Congo Basin biodiversity. Biological Conservation, 293, 110–125. ScienceDirect
Dargie, G. C., Lewis, S. L., Lawson, I. T., et al. (2017). Age, extent and carbon storage of the central Congo Basin peatland complex. Nature, 542(7639), 86–90. Priestley Centre for Climate Futures+1
Jiang, X., Frankenberg, C., Bowman, K. W., et al. (2023). Congo Basin rainforest is a net carbon source during the dry season. Earth and Space Science, 10(x), e2022EA002644. Wiley Online Library+1
United Nations Environment Programme. (2025). Protecting the Congo Basin peatlands. UNEP-DHI Centre. UNEP-DHI+1
United Nations Economic Commission for Africa. (2024). African perspectives of a just transition to low-carbon economies: Summary for policymakers. UNECA. CENUA
World Bank. (2025). Why Congo Basin forests can’t be ignored: A global lifeline at a crossroads. World Bank Blogs. World Bank Blogs
Forest Declaration Assessment. (2022). Tracking progress towards forest goals in the Congo Basin. Forest Declaration Platform. Forest Declaration Assessment+1
Global Witness. (2024). Why the Congo Basin, the world’s largest forest carbon sink, is at risk. Global Witness. Global Witness
Author
Discover more from Interdisciplinary Research Journal and Archives
Subscribe to get the latest posts sent to your email.
