Fossil Fuels Drive Carbon Emissions Higher
Global fossil fuel emissions are projected to reach an unprecedented 38.1 billion tonnes of CO2 in 2025, according to the latest Global Carbon Budget report. The study, released as COP30 climate talks unfold in the Brazilian Amazon, highlights the ongoing challenge of limiting global warming under 1.5°C. Despite the rapid expansion of renewable energy technologies, growing demand for oil, gas, and coal continues to outweigh reductions, resulting in a 1.1% increase in fossil fuel emissions compared to last year.
Pierre Friedlingstein from Britain’s Exeter University, who led the research, warned that humanity’s remaining carbon budget to stay below 1.5°C is just 170 billion tonnes — equivalent to roughly four years of current emissions. “This is essentially impossible,” he said, emphasizing the urgency for immediate and substantial global action.
Regional Trends and Policy Challenges
The report also examined emissions trends across major economies. China’s fossil fuel emissions remained mostly flat this year, particularly from coal, suggesting that renewables are starting to make an impact, although policy uncertainty prevents declaring a peak. In contrast, US coal emissions surged 7.5% as higher gas prices pushed power generation toward more polluting fuels. Europe also saw a modest increase, while India’s emissions rose less than in previous years thanks to strong renewable energy growth and an early monsoon.
Encouragingly, the study notes that 35 countries have successfully reduced emissions while growing their economies — double the number from a decade ago. Total global emissions, including land use, are projected to reach 42.2 billion tonnes this year, slightly lower than 2024, partly due to reduced deforestation and fewer destructive fires in South America following the end of the recent El Niño period.
