Projected Decline in CO2 Emissions for 2026
According to the latest report from the Global Carbon Project, carbon dioxide (CO2) emissions from fossil fuels and cement are expected to decrease by approximately 0.4% in 2026, reaching 38.2 billion tonnes (GtCO2).
Key Drivers Behind the Emission Decline
The 21st edition of the annual “global carbon budget” report, released today, attributes this modest reduction primarily to a 1.9% drop in oil emissions. This decline follows recent energy instabilities due to the conflict in Iran and the subsequent closure of the Strait of Hormuz.
Conversely, emissions from coal continue to experience a slight uptick.
Uncertainty in Projections
It is crucial to note that the Global Carbon Project’s forecasts for fossil fuel and cement CO2 emissions in 2026 are preliminary, suggesting a potential range of outcomes from a decline of 1.5% to an increase of 0.6%. Consequently, an increase in emissions cannot be ruled out.
Land-Use Emissions on the Rise
In stark contrast, emissions from land-use changes, such as deforestation, are projected to rise in 2026. This increase is primarily associated with peat fires and forest degradation in Southeast Asia, exacerbated by the ongoing development of a strong El Niño phenomenon. Therefore, total CO2 emissions from fossil fuels and land use are poised to reach a record 43.3 GtCO2 by 2026, marginally above the estimated 42.8 GtCO2 for 2025.
Advancements in Renewable Energy
Accompanying the report, a study published in Nature Climate Change indicates that the growth of solar, wind power, and electric vehicles (EVs) is currently offsetting around two-thirds of the emissions that would arise from rising energy demands. However, this growth is not sufficient to initiate a sustained decline in global emissions.
Key Findings from the 2026 Carbon Budget
- Projected fossil emissions are expected to decline in major economies: China (-0.9%), the US (-1.3%), and the EU (-1.5%), while India anticipates a rise of 4.4%.
- Oil emissions are expected to decrease across all major regions, with the steepest decline in China at -4.6%.
- Land-use emissions averaged 4.9 GtCO2 annually from 2016 to 2025, marking a 21% decrease compared to the previous decade.
- Total CO2 emissions (including fossil fuels and land use) increased by an average of 0.3% per year from 2016 to 2025, contrasting with the 1.7% annual growth of the preceding decade.
- The remaining carbon budget necessary to limit warming to 1.5°C stands at 150 GtCO2, equating to less than four years of current emissions.
- The land sink in 2025 reached its highest recorded level, rebounding after reductions attributed to the 2023-24 El Niño event, but is expected to weaken back down in 2027.
- CO2 concentrations in the atmosphere are projected to reach 427.7 parts per million (ppm) in 2026, representing a 54% increase over pre-industrial levels.
Total Emissions Rise Alongside Land-Use Emissions
The combination of fossil fuel and land-use emissions indicates total global CO2 emissions will rise to a record 43.3 GtCO2 in 2026, up from 42.8 GtCO2 in 2025.
This projected increase is solely due to rising land-use emissions, which are notably more complex to estimate than fossil emissions.
Historical Context of Emission Trends
This assessment updates historical records, revealing that total emissions have surged by 0.3% annually over the past decade. Fossil emissions grew about 0.9% each year in the same period, while land-use emissions are experiencing a decline.
Emissions peaked in early 2010 and have slightly declined since, with per-capita emissions expected to be around 4.6 tonnes per person in 2026, down 4% from the peak.
Challenges of Measuring Land Use Emissions
Land-use emissions, which arise from factors like deforestation and peatland fires, are projected to increase to 5.1 GtCO2 in 2026 from 4.4 GtCO2 in 2025. The rise is primarily driven by human-induced peat fires and forest degradation in Southeast Asia, particularly affected by drier conditions linked to El Niño.
Fossil Emissions Declining in Major Economies
Despite a projected 0.4% decrease in global fossil CO2 emissions, uncertainties remain, with possibilities ranging from a decline of 1.5% to an increase of 0.6% in 2026.
Emissions cover diverse regions, including significant reductions in the EU, US, and China, while India is expected to diverge with an increase of 4.4%.
The Future of Clean Energy Deployment
Though the shift towards clean energy is promising, the dynamics indicate that the transition is still insufficient to maintain a steady decline in emissions. In fact, the findings suggest that without additional acceleration in the deployment of solar, wind, and EV technologies, a sustained decline in CO2 emissions remains several years away.
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