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Data

Carbon intensity of energy

What you should know about this indicator

  • Average amount of CO₂ emitted for each unit of energy a country uses. It is calculated by dividing emissions from by .
  • It reflects how carbon-intensive a country's energy is. Lower values indicate a larger role for low-carbon sources such as nuclear and renewables.
Carbon intensity of energy
Carbon dioxide (CO₂) emitted per unit of , measured in grams of CO₂ per .
Source
Global Carbon Budget (2025); U.S. Energy Information Administration (2026); Energy Institute - Statistical Review of World Energy (2025) – with major processing by Our World in Data
Last updated
November 13, 2025
Next expected update
November 2026
Date range
1965–2024
Unit
grams per kilowatt-hour

Sources and processing

This data is based on the following sources

Global Carbon Project – Global Carbon Budget

The Global Carbon Budget was established by the Global Carbon Project (GCP) to track global carbon emissions and sinks.

This dataset makes it possible to assess whether countries are making progress toward the goals of the Paris Agreement and is widely recognized as the most comprehensive report of its kind.

Since 2001, the GCP has published estimates of global and national fossil CO₂ emissions. Initially, these were simple republished data from other sources, but over time, refinements were made based on feedback and correction of inaccuracies.

Retrieved on
November 13, 2025
Retrieved from
https://globalcarbonbudget.org/
Citation
This is the citation of the original data obtained from the source, prior to any processing or adaptation by Our World in Data. To cite data downloaded from this page, please use the suggested citation given in Reuse This Work below.
Andrew, R. M., & Peters, G. P. (2025). The Global Carbon Project's fossil CO2 emissions dataset (2025v15) [Data set]. Zenodo. https://doi.org/10.5281/zenodo.17417124
The data files of the Global Carbon Budget can be found at: https://globalcarbonbudget.org/carbonbudget/
For more details, see the original paper:
Friedlingstein, P., O'Sullivan, M., Jones, M. W., Andrew, R. M., Bakker, D. C. E., Hauck, J., Landschützer, P., Le Quéré, C., Luijkx, I. T., Peters, G. P., Peters, W., Pongratz, J., Schwingshackl, C., Sitch, S., Canadell, J. G., Ciais, P., Jackson, R. B., Alin, S. R., Anthoni, P., Barbero, L., Bates, N. R., Becker, M., Bellouin, N., Decharme, B., Bopp, L., Brasika, I. B. M., Cadule, P., Chamberlain, M. A., Chandra, N., Chau, T.-T.-T., Chevallier, F., Chini, L. P., Cronin, M., Dou, X., Enyo, K., Evans, W., Falk, S., Feely, R. A., Feng, L., Ford, D. J., Gasser, T., Ghattas, J., Gkritzalis, T., Grassi, G., Gregor, L., Gruber, N., Gürses, Ö., Harris, I., Hefner, M., Heinke, J., Houghton, R. A., Hurtt, G. C., Iida, Y., Ilyina, T., Jacobson, A. R., Jain, A., Jarníková, T., Jersild, A., Jiang, F., Jin, Z., Joos, F., Kato, E., Keeling, R. F., Kennedy, D., Klein Goldewijk, K., Knauer, J., Korsbakken, J. I., Körtzinger, A., Lan, X., Lefèvre, N., Li, H., Liu, J., Liu, Z., Ma, L., Marland, G., Mayot, N., McGuire, P. C., McKinley, G. A., Meyer, G., Morgan, E. J., Munro, D. R., Nakaoka, S.-I., Niwa, Y., O'Brien, K. M., Olsen, A., Omar, A. M., Ono, T., Paulsen, M., Pierrot, D., Pocock, K., Poulter, B., Powis, C. M., Rehder, G., Resplandy, L., Robertson, E., Rödenbeck, C., Rosan, T. M., Schwinger, J., Séférian, R., Smallman, T. L., Smith, S. M., Sospedra-Alfonso, R., Sun, Q., Sutton, A. J., Sweeney, C., Takao, S., Tans, P. P., Tian, H., Tilbrook, B., Tsujino, H., Tubiello, F., van der Werf, G. R., van Ooijen, E., Wanninkhof, R., Watanabe, M., Wimart-Rousseau, C., Yang, D., Yang, X., Yuan, W., Yue, X., Zaehle, S., Zeng, J., and Zheng, B.: Global Carbon Budget 2023, Earth Syst. Sci. Data, 15, 5301-5369, https://doi.org/10.5194/essd-15-5301-2023, 2023.

The Global Carbon Budget was established by the Global Carbon Project (GCP) to track global carbon emissions and sinks.

This dataset makes it possible to assess whether countries are making progress toward the goals of the Paris Agreement and is widely recognized as the most comprehensive report of its kind.

Since 2001, the GCP has published estimates of global and national fossil CO₂ emissions. Initially, these were simple republished data from other sources, but over time, refinements were made based on feedback and correction of inaccuracies.

Retrieved on
November 13, 2025
Retrieved from
https://globalcarbonbudget.org/
Citation
This is the citation of the original data obtained from the source, prior to any processing or adaptation by Our World in Data. To cite data downloaded from this page, please use the suggested citation given in Reuse This Work below.
Andrew, R. M., & Peters, G. P. (2025). The Global Carbon Project's fossil CO2 emissions dataset (2025v15) [Data set]. Zenodo. https://doi.org/10.5281/zenodo.17417124
The data files of the Global Carbon Budget can be found at: https://globalcarbonbudget.org/carbonbudget/
For more details, see the original paper:
Friedlingstein, P., O'Sullivan, M., Jones, M. W., Andrew, R. M., Bakker, D. C. E., Hauck, J., Landschützer, P., Le Quéré, C., Luijkx, I. T., Peters, G. P., Peters, W., Pongratz, J., Schwingshackl, C., Sitch, S., Canadell, J. G., Ciais, P., Jackson, R. B., Alin, S. R., Anthoni, P., Barbero, L., Bates, N. R., Becker, M., Bellouin, N., Decharme, B., Bopp, L., Brasika, I. B. M., Cadule, P., Chamberlain, M. A., Chandra, N., Chau, T.-T.-T., Chevallier, F., Chini, L. P., Cronin, M., Dou, X., Enyo, K., Evans, W., Falk, S., Feely, R. A., Feng, L., Ford, D. J., Gasser, T., Ghattas, J., Gkritzalis, T., Grassi, G., Gregor, L., Gruber, N., Gürses, Ö., Harris, I., Hefner, M., Heinke, J., Houghton, R. A., Hurtt, G. C., Iida, Y., Ilyina, T., Jacobson, A. R., Jain, A., Jarníková, T., Jersild, A., Jiang, F., Jin, Z., Joos, F., Kato, E., Keeling, R. F., Kennedy, D., Klein Goldewijk, K., Knauer, J., Korsbakken, J. I., Körtzinger, A., Lan, X., Lefèvre, N., Li, H., Liu, J., Liu, Z., Ma, L., Marland, G., Mayot, N., McGuire, P. C., McKinley, G. A., Meyer, G., Morgan, E. J., Munro, D. R., Nakaoka, S.-I., Niwa, Y., O'Brien, K. M., Olsen, A., Omar, A. M., Ono, T., Paulsen, M., Pierrot, D., Pocock, K., Poulter, B., Powis, C. M., Rehder, G., Resplandy, L., Robertson, E., Rödenbeck, C., Rosan, T. M., Schwinger, J., Séférian, R., Smallman, T. L., Smith, S. M., Sospedra-Alfonso, R., Sun, Q., Sutton, A. J., Sweeney, C., Takao, S., Tans, P. P., Tian, H., Tilbrook, B., Tsujino, H., Tubiello, F., van der Werf, G. R., van Ooijen, E., Wanninkhof, R., Watanabe, M., Wimart-Rousseau, C., Yang, D., Yang, X., Yuan, W., Yue, X., Zaehle, S., Zeng, J., and Zheng, B.: Global Carbon Budget 2023, Earth Syst. Sci. Data, 15, 5301-5369, https://doi.org/10.5194/essd-15-5301-2023, 2023.

U.S. Energy Information Administration – International Energy Data

Retrieved on
May 5, 2026
Retrieved from
https://www.eia.gov/opendata/bulkfiles.php
Citation
This is the citation of the original data obtained from the source, prior to any processing or adaptation by Our World in Data. To cite data downloaded from this page, please use the suggested citation given in Reuse This Work below.
U.S. Energy Information Administration (EIA) - International Energy Data (2026).
Retrieved on
May 5, 2026
Retrieved from
https://www.eia.gov/opendata/bulkfiles.php
Citation
This is the citation of the original data obtained from the source, prior to any processing or adaptation by Our World in Data. To cite data downloaded from this page, please use the suggested citation given in Reuse This Work below.
U.S. Energy Information Administration (EIA) - International Energy Data (2026).

Energy Institute – Statistical Review of World Energy

The Energy Institute Statistical Review of World Energy analyses data on world energy markets from the prior year.

Retrieved on
June 27, 2025
Retrieved from
https://www.energyinst.org/statistical-review/
Citation
This is the citation of the original data obtained from the source, prior to any processing or adaptation by Our World in Data. To cite data downloaded from this page, please use the suggested citation given in Reuse This Work below.
Energy Institute - Statistical Review of World Energy (2025).

The Energy Institute Statistical Review of World Energy analyses data on world energy markets from the prior year.

Retrieved on
June 27, 2025
Retrieved from
https://www.energyinst.org/statistical-review/
Citation
This is the citation of the original data obtained from the source, prior to any processing or adaptation by Our World in Data. To cite data downloaded from this page, please use the suggested citation given in Reuse This Work below.
Energy Institute - Statistical Review of World Energy (2025).

How we process data at Our World in Data

All data and visualizations on Our World in Data rely on data sourced from one or several original data providers. Preparing this original data involves several processing steps. Depending on the data, this can include standardizing country names and world region definitions, converting units, calculating derived indicators such as per capita measures, as well as adding or adapting metadata such as the name or the description given to an indicator.

At the link below you can find a detailed description of the structure of our data pipeline, including links to all the code used to prepare data across Our World in Data.

Read about our data pipeline
Notes on our processing step for this indicator
  • Global emissions are converted from tonnes of carbon to tonnes of carbon dioxide (CO₂) using a factor of 3.664. This is the conversion factor recommended by the Global Carbon Project. It reflects that one tonne of carbon, when fully oxidized, forms 3.664 tonnes of CO₂, based on the relative molecular weights of carbon and oxygen in CO₂.
  • Emissions from the 1991 Kuwaiti oil fires are included in Kuwait's emissions for that year.

Reuse this work

  • All data produced by third-party providers and made available by Our World in Data are subject to the license terms from the original providers. Our work would not be possible without the data providers we rely on, so we ask you to always cite them appropriately (see below). This is crucial to allow data providers to continue doing their work, enhancing, maintaining and updating valuable data.
  • All data, visualizations, and code produced by Our World in Data are completely open access under the Creative Commons BY license. You have the permission to use, distribute, and reproduce these in any medium, provided the source and authors are credited.

Citations

How to cite this page

To cite this page overall, including any descriptions, FAQs or explanations of the data authored by Our World in Data, please use the following citation:

“Data Page: Carbon intensity of energy”, part of the following publication: Hannah Ritchie, Pablo Rosado, and Max Roser (2023) - “CO₂ and Greenhouse Gas Emissions”. Data adapted from Global Carbon Project, U.S. Energy Information Administration, Energy Institute. Retrieved from https://archive.ourworldindata.org/20260602-162433/grapher/co2-per-unit-energy.html [online resource] (archived on June 2, 2026).

How to cite this data

In-line citationIf you have limited space (e.g. in data visualizations), you can use this abbreviated in-line citation:

Global Carbon Budget (2025); U.S. Energy Information Administration (2026); Energy Institute - Statistical Review of World Energy (2025) – with major processing by Our World in Data

Full citation

Global Carbon Budget (2025); U.S. Energy Information Administration (2026); Energy Institute - Statistical Review of World Energy (2025) – with major processing by Our World in Data. “Carbon intensity of energy” [dataset]. Global Carbon Project, “Global Carbon Budget v15”; U.S. Energy Information Administration, “International Energy Data”; Energy Institute, “Statistical Review of World Energy” [original data]. Retrieved June 2, 2026 from https://archive.ourworldindata.org/20260602-162433/grapher/co2-per-unit-energy.html (archived on June 2, 2026).

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