CO2 Emissions Statistics

An essential tool for analysts and policy makers

In recognition of the fundamental importance of understanding energy related environmental issues, the IEA's CO2 Emissions from Fuel Combustion provides a full analysis of emissions stemming from energy use. This annual publication has become an essential tool for analysts and policy makers in many international fora. The IEA also produces CO2 Emissions Factors.

The 2019 edition of the CO2 Emissions from Fuel Combustion report will be released early-November.

Meanwhile, discover the final edition of the newly released data service, and an overview of the 2019 report.


Data service Download the overview Pre-order the 2019 edition Purchase the 2018 edition Free 2018 data highlights

Access database documentation on CO2 emissions from fuel combustion

Drivers of CO2 emissions


CO2 emissions from fuel combustion are affected by a range of drivers, including population growth, GDP and energy supply. CO2 emissions from electricity generation, around 40% of the total, are driven by electricity output, generation efficiency, share and carbon intensity of fossil generation. Explore how these factors have affected emissions across a range of countries and regions in our interactive below:

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CO2 emissions from fuel combustion reach new heights


After three years of stability, global CO2 emissions from fuel combustion started rising again in 2017, reaching 32.8 billion tons. Provisional data show they grew even faster in 2018, with robust economic growth and the slowdown in renewables penetration more than offsetting some improvement in energy productivity.

All values up to 2017 for World and 2018 for OECD are based on CO2 Emissions from Fuel Combustion 2019. The 2018 value for World is based on IEA Global Energy & CO2 Status Report 2019.

	OECD	Non OECD	World
2000	12.55041	9.836415	23.23977
2001	12.57564	10.19156	23.58843
2002	12.46341	10.5836	23.9061
2003	12.6874	11.38739	24.94266
2004	12.80958	12.36179	26.1172
2005	12.84368	13.23936	27.0748
2006	12.76991	14.11933	27.93353
2007	12.93062	14.96069	28.98381
2008	12.61044	15.51648	29.22923
2009	11.88268	15.91306	28.8453
2010	12.36605	17.08494	30.57135
2011	12.11966	18.13496	31.39258
2012	11.93657	18.7458	31.77749
2013	11.98781	19.27382	32.36286
2014	11.7495	19.55092	32.43916
2015	11.69049	19.54988	32.43086
2016	11.61374	19.56755	32.41376
2017	11.57853	19.97933	32.83986
2018	11.63071	20.45181	33.39814
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	OECD	Non OECD
2014-2015	-59.0074	-1.04171
2015-2016	-76.7506	17.67113
2016-2017	-35.2114	411.7793
2017-2018	52.17789	472.4831
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Sectoral disaggregation


Electricity/heat generation and transport account for two thirds of total CO2  emissions and were equally responsible of almost the entire global growth in emissions since 2010; the remaining third is split between industry and buildings.

The picture changes after reallocating emissions from power generation to the final sectors: industry accounts for slightly less than one half of total emissions, buildings and transport for one quarter each. The buildings sector uses one half of the electricity that is consumed globally (21 000 TWh), industry the other half; transport is not yet visibly electrified.

	Electricity & heat generation	Transport	Industry	Buildings	Other
2017	13.60330193	8.039918588	7.810383225	2.771055513	0.615198767
2017 ele/heat reallocated	0	8.239133019	14.16300574	8.670573491	1.767143049
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