China’s carbon dioxide (CO2) emissions fell by 1% in the final quarter of 2025, likely securing a decline of 0.3% for the full year as a whole.
This extends a “flat or falling” trend in China’s CO2 emissions that began in March 2024 and has now lasted for nearly two years.
The new analysis for Carbon Brief shows that, in 2025, emissions from fossil fuels increased by an estimated 0.1%, but this was more than offset by a 7% decline in CO2 from cement.
Other key findings include:
CO2 emissions fell year-on-year in almost all major sectors in 2025, including transport (3%), power (1.5%) and building materials (7%).
The key exception was the chemicals industry, where emissions grew 12%.
Solar power output increased by 43% year-on-year, wind by 14% and nuclear 8%, helping push down coal generation by 1.9%.
Energy storage capacity grew by a record 75 gigawatts (GW), well ahead of the rise in peak demand of 55GW.
This means that growth in energy storage capacity and clean-power output topped the increases in peak and total electricity demand, respectively.
The CO2 numbers imply that China’s carbon intensity – its fossil-fuel emissions per unit of GDP – fell by 4.7% in 2025 and by 12% during 2020-25.
This is well short of the 18% target set for that period by the 14th five-year plan.
Moreover, China would now need to cut its carbon intensity by around 23% over the next five years in order to meet one of its key climate commitments under the Paris Agreement.
Whether Chinese policymakers remain committed to this target is a key open question ahead of the publication of the 15th five-year plan in March.
This will help determine if China’s emissions have already passed their peak, or if they will rise once again and only peak much closer to the officially targeted date of “before 2030”.
‘Flat or falling’
The latest analysis shows China’s CO2 emissions have now been flat or falling for 21 months, starting in March 2024. This trend continued in the final quarter of 2025, when emissions fell by 1% year-on-year.
The picture continues to be finely balanced, with emissions falling in all major sectors – including transport, power, cement and metals – but rising in the chemicals industry.
This combination of factors means that emissions continue to plateau at levels slightly below the peak reached in early 2024.
Emissions are estimated from National Bureau of Statistics data on production of different fuels and cement, China Customs data on imports and exports and WIND Information data on changes in inventories, applying emissions factors from China’s latest national greenhouse gas emissions inventory and annual emissions factors per tonne of cement production until 2024. Sector breakdown of coal consumption is estimated using coal consumption data from WIND Information and electricity data from the National Energy Administration. The consumption of petrol, diesel and jet fuel is adjusted to match quarterly totals estimated by Sinopec.
Power sector emissions fell by 1.5% year-on-year in 2025, with coal use falling 1.7% and gas use increasing 6%.
Emissions from transportation fell 3% and from the production of cement and other building materials by 7%, while emissions from the metal industry fell 3%.
These declines were partially offset by rising coal and oil use in the chemical industry, up 15% and 10% respectively, which pushed up the sector’s CO2 emissions by 12% overall.
In other sectors – largely other industrial areas and building heat – gas use increased by 2%, more than offsetting the reduction in emissions from a 3% drop in their coal consumption
