Introduction to Land Use and Greenhouse Gases (GHGs)
Land plays a critical role in the global carbon cycle, influencing emissions and removals of greenhouse gases (GHGs) such as carbon dioxide (CO₂), methane (CH₄), and nitrous oxide (N₂O). The United Nations Framework Convention on Climate Change (UNFCCC) recognizes the significance of sustainable land use for mitigating climate change and promoting adaptation. The Paris Agreement (Article 5) reinforces this by highlighting efforts like forests and REDD+ (Reducing Emissions from Deforestation and Forest Degradation).
Land Use, Land-Use Change, and Forestry (LULUCF)
Role of Land in Climate Mitigation
Land-based activities, including forestry, agriculture, and land-use change, significantly influence carbon sequestration and GHG emissions. According to the IPCC 6th Assessment Report, the Agriculture, Forestry, and Other Land Use (AFOLU) sector contributed 13–21% of global GHG emissions (2010–2019).
Key Findings on Land Use and Carbon Storage
- Deforestation is the major driver of emissions, accounting for 45% of AFOLU emissions.
- Forests, croplands, and grasslands serve as carbon sinks, storing CO₂ in soil and vegetation.
- Mitigation strategies include reforestation, afforestation, sustainable land management, and soil carbon sequestration.
- Challenges: Carbon storage in vegetation and soils is not permanent and can be reversed by human activities, climate change, and natural disasters.
REDD+ and Land-Based Mitigation
What is REDD+?
REDD+ is a framework under the UNFCCC to reduce deforestation and forest degradation while enhancing carbon sinks. It plays a crucial role in global climate action, as forests help mitigate climate change by:
- Reducing emissions from deforestation.
- Enhancing biodiversity and water resources.
- Supporting food security and sustainable development.
Challenges and Implementation Needs
- Financial and Institutional Support: Countries need resources to implement REDD+ effectively.
- Monitoring and Reporting: Clear metrics are required to assess REDD+ effectiveness.
- Global Cooperation: REDD+ aligns with the Paris Agreement, Sustainable Development Goals (SDGs), and the UN Decade on Ecosystem Restoration.
Conclusion
Land use is a key element in global climate strategies. Sustainable land management, afforestation, and emission reduction from agriculture can significantly contribute to mitigating climate change. However, these efforts require strong policy integration, financial support, and collaboration to ensure long-term impact.
Reference: UNFCCC Archives
https://unfccc.int/about-us/unfccc-archives