Forest by Nurserylive

How Much CO2 Can One Tree Absorb?

April 16, 2025

Introduction Trees are powerful allies in the fight against climate change. They naturally absorb carbon dioxide (CO2) from the atmosphere through photosynthesis and store it in their trunks, branches, roots, and leaves. However, a common question ar Read more

How Much CO2 Can One Tree Absorb?

Introduction

Trees are powerful allies in the fight against climate change. They naturally absorb carbon dioxide (CO2) from the atmosphere through photosynthesis and store it in their trunks, branches, roots, and leaves. However, a common question arises: How much CO2 can a single tree absorb? The answer isn’t straightforward because it depends on several factors, including tree species, age, planting method, location, and environmental conditions.


How Trees Absorb CO2: The Science

Carbon sequestration in trees refers to the process of capturing and storing atmospheric CO2 in a tree’s biomass. The calculation typically involves:

  1. Biomass Accumulation (dry weight) = Total Volume × Wood Density × Biomass Expansion Factor (BEF)

  2. Carbon Stored = Biomass × 0.5 (as about 50% of biomass is carbon)

  3. CO2 Sequestered = Carbon × 3.67 (conversion factor to CO2 equivalent)

Example: Mango Tree (30 years)

  • Average Biomass Accumulation: 400 kg dry weight

  • Carbon Stored: 400 × 0.5 = 200 kg

  • CO₂ Sequestered: 200 × 3.67 = 734 kg CO₂

  • Annual Average: 734 ÷ 30 = ~24.6 kg CO₂/year


Annual and Lifetime Carbon Sequestration (By Tree Type)

Different tree species sequester carbon at varying rates. Here's an illustrative table:

Tree Species Category Lifespan (yrs) Annual CO2 (kg) Lifetime CO2 (kg)
Mango Fruit Trees 30 25 750
Guava Fruit Trees 15 12.5 187.5
Custard Apple Fruit Trees 15 10 150
Lemon Fruit Trees 15 12 180
Tamarind Fruit Trees 30 20 600
Amla Fruit Trees 15 12.5 187.5
Jamun Fruit Trees 30 20 600
Mahogany Timber Trees 30 25 750
Teak Timber Trees 30 25 750
Sheesham Timber Trees 30 20 600
Neem Forestry Trees 30 20 600
Arjun Forestry Trees 30 20 600
Rain Tree Forestry Trees 30 20 600

Note: These values are averages and vary based on growing conditions and management.


Impact of Location: Rainforest vs Other Forests

  • Tropical Rainforests have high biodiversity and rapid growth rates, making them highly effective for carbon capture. One hectare can absorb up to 25 to 30 tons of CO2 annually.

  • Temperate Forests generally absorb 2 to 5 tons of CO2 per hectare per year, depending on species and age.

  • Urban Forests or scattered trees in cities may have lower sequestration rates due to stressors like pollution and limited space, but they offer vital environmental services.


Per Hectare Carbon Sequestration Potential

  • Dense Forests (natural or manmade): ~15 to 30 tons CO2/hectare/year

  • Agroforestry Systems: 5 to 15 tons CO2/hectare/year

  • Miyawaki Forests (ultra-dense plantations): Up to 30 tons CO2/hectare/year due to faster biomass accumulation


Impact of Plantation Methods

1. Agroforestry:

  • Integrates trees with crops/livestock

  • Slower CO2 absorption compared to dense plantations, but enhances biodiversity and provides livelihood benefits

2. Miyawaki Method:

  • Dense plantation of native species in small urban or rural spaces

  • Fast-growing, high biomass systems that can sequester carbon 10x faster than traditional forests

  • Excellent for degraded lands and urban reforestation


Key Factors That Influence Carbon Sequestration

  1. Species Type: Timber trees like Mahogany or Teak store more carbon due to their dense wood.

  2. Growth Rate: Fast-growing trees like Rain Tree absorb more in early years.

  3. Environmental Conditions: Adequate sunlight, water, and nutrient-rich soil improve sequestration.

  4. Tree Age: Young trees absorb less; middle-aged trees absorb the most.

  5. Maintenance: Regular care improves health and growth, enhancing carbon capture.

  6. Lifespan: Long-lived trees provide sustained carbon storage.


Above vs. Below the Ground Carbon Storage

Component Description Carbon Contribution
Above-ground Biomass Trunks, branches, leaves, and fruits. Sequester carbon visibly. 60–70%
Below-ground Biomass Roots and soil organic matter. Hidden, but vital for long-term storage. 30–40%

 

Soil carbon, especially in well-managed forests, can continue to accumulate even after the trees mature — contributing to carbon stability for decades.

Why This Matters

Understanding how much CO2 a tree can absorb helps in:

  • Planning effective afforestation and reforestation projects

  • Designing carbon offset initiatives

  • Quantifying environmental impact for CSR and ESG commitments

  • Educating communities on climate action


Final Thoughts

While the average tree can absorb between 10 to 25 kg of CO2 per year, this varies widely. Planting and protecting trees is a scalable, natural solution to mitigate climate change. Whether it's a single Neem in your backyard or a Miyawaki forest in an urban block, every tree counts in building a greener, cooler planet.


Fun Fact: One mature tree can offset the CO2 emissions of a 500 km car ride in a year!

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