Summary
This comprehensive analysis synthesises land-based climate mitigation potentials for 20 measures across over 200 countries and five regions, comparing bottom-up sectoral estimates with integrated assessment models. Cost-effective mitigation (up to $100/tCO₂ eq) is estimated at 8–13.8 GtCO₂ eq yr⁻¹ by 2050, with approximately 50% from forests and ecosystems, 35% from agriculture, and 15% from demand-side measures. The study emphasises that 80% of potential lies in developing countries and least-developed countries where feasibility barriers—governance, investment, and socio-cultural factors—present significant challenges to realisation.
UK applicability
The United Kingdom is likely among higher-income countries with established governance and investment capacity, potentially better positioned to overcome feasibility barriers. UK-relevant opportunities may include demand-side measures, forest protection, and agricultural practices, though the study's global scope means country-specific UK potential and sectoral focus would require disaggregated analysis of the dataset.
Key measures
Cost-effective mitigation potential (GtCO₂ eq yr⁻¹) by measure and country; technical potential; cost per tCO₂ eq; mitigation efficiency; co-benefits; feasibility barriers (governance, economic investment, socio-cultural conditions)
Outcomes reported
The study quantified cost-effective land-based climate mitigation potential at 8–13.8 GtCO₂ eq yr⁻¹ between 2020 and 2050 across 20 measures in over 200 countries, and assessed implementation feasibility at country level. It compared bottom-up sectoral estimates with integrated assessment models and identified that protection of forests and demand-side measures offer particularly high mitigation efficiency and co-benefits.
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