Researchers project a 0.4% decrease in fossil fuel CO₂ emissions for 2026, driven by clean energy growth and energy market shocks.

Global carbon dioxide emissions from fossil fuels are expected to fall by 0.4 percent in 2026, according to new research. This projected decline is attributed to the expansion of wind, solar, and electric vehicle technologies, alongside an energy shock caused by the conflict in Iran that has increased fuel prices.

Drivers of the Emissions Dip

The 2026 Global Carbon Budget report indicates that while global energy demand is rising, two-thirds of that growth is being met by clean energy sources. However, researchers caution that the current decline is partially linked to high oil prices resulting from the conflict in Iran, which has led to a projected 1.9 percent decrease in oil-related emissions. Experts note that this geopolitical factor makes the current dip an unsustainable solution for long-term climate goals.

Long-term Climate Outlook

Despite the projected decrease in fossil fuel emissions, total CO₂ emissions—which include land-use changes like deforestation—are expected to reach 43.3 billion metric tons in 2026, up from 42.8 billion metric tons in 2025. The remaining carbon budget to keep warming below 1.5°C is estimated at 150 billion metric tons, representing less than four years of current emissions. Researchers emphasize that a rapid, sustained acceleration of clean energy deployment is necessary to achieve a durable peak and subsequent decline in global emissions.