One of the following regions has the world’s largest tropical peatland, which holds about three years worth of global carbon emissions from fossil fuels; and the possible destruction of which can exert detrimental effect on the global climate. Which one of the following denot that region ?
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- AAmazon Basin
- BCongo Basin
- CKikon Basin
- DRio de la Plata Basin
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Answer: (B) Congo Basin
Correct Answer: (b) Congo Basin.
The Congo Basin holds the world's largest tropical peatlands, storing about 29 billion tonnes of carbon — roughly equivalent to three years of global fossil fuel emissions.
It also absorbs nearly 1.5 billion tonnes of CO₂ per year, making it one of the last regions that absorbs more carbon than it emits.
The Basin spans six countries:
- Cameroon
- Central African Republic
- DR Congo
- Republic of Congo
- Equatorial Guinea
- Gabon
Key point: While the Amazon is better known as a carbon sink, the Congo Basin's peatlands are the world's largest tropical peat stores.
Destroying them would release enormous amounts of greenhouse gases.
The Congo Basin stores 29 billion tonnes of carbon in peatlands — equivalent to three years of global fossil fuel emissions — making it critical for climate stability.
Recent scientific discoveries in the 2010s-2020s revealed that Congo Basin peatlands are larger carbon stores than previously known, bringing new focus to this region in climate discussions.
UPSC is testing whether students know the difference between general forest carbon storage (Amazon) versus specific peatland carbon storage (Congo Basin).
Congo Basin Peatlands
Geography Congo Basin tropical peatland
Congo Basin Peatlands: World's Largest Tropical Carbon Store
Congo Basin contains the world's largest tropical peatlands storing 29 billion tonnes of carbon
Stores carbon equivalent to 3 years of global fossil fuel emissions
Absorbs 1.5 billion tonnes of CO₂ annually - more than it emits
Spans 6 countries: Cameroon, CAR, DR Congo, Republic of Congo, Equatorial Guinea, Gabon
What Makes It Special
The Congo Basin's peatlands are waterlogged areas where dead plant material accumulates faster than it decomposes, creating massive carbon stores. Unlike the better-known Amazon, the Congo Basin is one of the last regions that absorbs more carbon than it emits, making it crucial for global climate stability.
Congo Basin Location
Source: UBIQUE — Map of The Week: Congo Basin Peatland CO2 | UBIQUE · ubiqueags.org
Climate Impact
Peat destruction releases stored carbon as CO₂ and methane into atmosphere
Basin acts as a global climate regulator through massive carbon absorption
Deforestation or drainage could convert it from carbon sink to carbon source
Contains 10% of world's tropical forests beyond just peatlands
Question Context
UPSC tested this lesser-known fact about Congo Basin being the world's largest tropical peatland rather than the more famous Amazon Basin. The key distinction is peatlands specifically - waterlogged carbon storage areas.
Trap: Most students choose Amazon Basin as it's the famous 'lungs of Earth' - but Congo has larger peatlands
Congo Basin vs Amazon: Congo has larger peat stores, Amazon has larger overall forest area
Remember: 29 billion tonnes carbon = 3 years global fossil fuel emissions
Major World River Basins
Geography Amazon Basin Congo Basin Rio de la Plata Basin
Major River Basins: Geographic & Environmental Comparison
Amazon Basin - world's largest river basin by discharge and forest area
Congo Basin - world's largest tropical peatlands and second-largest tropical forest
Rio de la Plata Basin - major South American river system draining into Atlantic
Basin Characteristics
Basin | Location | Key Feature | Climate Significance |
|---|---|---|---|
Amazon Basin | Northern South America (Brazil, Peru, Colombia) | Largest tropical rainforest, highest biodiversity | Major carbon sink, oxygen production |
Congo Basin | Central Africa (6 countries) | Largest tropical peatlands, 29 billion tonnes carbon | Largest tropical carbon store |
Rio de la Plata Basin | SE South America (Argentina, Brazil, Uruguay) | Major river system (Paraná, Paraguay, Uruguay rivers) | Agricultural heartland, limited carbon storage |
Global Basin Locations
Source: MapsforUPSC — Major Rivers of the World with Map, Locations & Key Facts · mapsforupsc.com
Environmental Rankings
Forest area: Amazon > Congo > Rio de la Plata (minimal forest)
Peat carbon storage: Congo > Amazon > Rio de la Plata
River discharge: Amazon > Congo > Rio de la Plata
Biodiversity: Amazon > Congo > Rio de la Plata
Don't assume Amazon is always the answer - Congo leads in specific categories like peatlands
Rio de la Plata is a major basin but has minimal tropical forest/carbon storage
Note: Kikon Basin in the original question appears to be a distractor - no major basin by this name exists
Carbon Cycle & Climate Impact
Environment carbon emissions fossil fuels global climate
Carbon Cycle: Sinks, Sources & Climate Impact
Carbon sinks absorb more CO₂ than they emit (forests, oceans, peatlands)
Carbon sources emit more CO₂ than they absorb (fossil fuel burning, deforestation)
Global fossil fuel emissions are approximately 10 billion tonnes CO₂ annually
Carbon Storage Mechanisms
Peatlands store carbon by preventing decomposition in waterlogged conditions. Forests store carbon in living biomass (trees) and soil. When these ecosystems are destroyed, stored carbon releases as CO₂, accelerating climate change.
Carbon Cycle Process
%%{init: {"flowchart": {"wrappingWidth": 460}}}%%
flowchart TD
s1["`**CO₂ Absorption**
Plants absorb CO₂ from atmosphere through photosynthesis`"]
s2["`**Carbon Storage**
Carbon stored in plant biomass, soil, and peat deposits`"]
s3["`**Natural Release**
Some CO₂ released through respiration and decomposition`"]
s4["`**Human Disruption**
Deforestation/drainage releases stored carbon rapidly`"]
s1 --> s2
s2 --> s3
s3 --> s4Major Carbon Stores
Carbon Store | Capacity | Time to Form | Release Risk |
|---|---|---|---|
Tropical Peatlands | Massive (Congo: 29 billion tonnes) | Thousands of years | High if drained/burned |
Tropical Forests | Large (Amazon: ~150-200 billion tonnes) | Decades to centuries | High if deforested |
Ocean | Largest global store | Geological timescales | Low direct risk |
Fossil Fuels | Large but finite | Millions of years | High - being extracted rapidly |
Remember: 3 years of emissions = 29 billion tonnes shows massive scale of peat storage
Don't confuse carbon sinks (absorb CO₂) with carbon sources (emit CO₂)
Peatland destruction can flip ecosystem from sink to major source instantly