The UNFCCC makes it needlessly difficult to download emission data submitted by countries. To make it easier for people to access and download this data, I am providing bundles of National Inventory Reports (NIR) and Common Reporting Tables (CRT) here.

Each download contains all available CRTs or NIRs for a year for all Annex I countries.

Year	National Inventory Reports	Common Reporting Tables
2025	Download 2025 NIDs	Download 2025 CRTs
2024	Download 2024 NIDs	Download 2025 CRTs
2023	Download 2023 NIDs	Download 2023 CRTs

Source: UNFCCC National Inventory Submissions

If you find this service helpful and use it for a scientific, journalistic, or otherwise interesting project, please let me know.

FAQ

What are .tar.xz files and how can I unpack them?

The .tar.xz format is an archiving and compression format, similar to ZIP files, but with much better compression. Providing the data in .tar.xz format allows for much smaller file sizes. (For the CRT bundles, it decreases the file size by a factor of 5.)

Unfortunately, Windows and macOS do not have native support for this format, but free tools are available. Windows users can use 7-Zip, macOS users can use The Unarchiver. Linux systems support .tar.xz by default, no extra tools are needed.

What about Copyright?

The UNFCCC web page states:

"All official texts, data and documents, including low resolution webcast transmissions, are in the public domain and may be freely downloaded, copied and printed provided no change to the content is introduced, and the source is duly acknowledged."

It is, therefore, allowed to share this data when the source is acknowledged.

What about earlier years?

More data will become available here over time.

There is usually no need to access older Common Reporting Tables. The latest versions contain all data back to the start of the data collection (usually 1990).