Talk:Carbon credit

Rename to carbon allowance?
I propose renaming this article to carbon allowance.

The existing name carbon credit seems ambiguous because some sources say a carbon credit is a carbon offset and some say it is a carbon allowance.

As I understand it

voluntary carbon credit = carbon offset

compliance carbon credit = carbon allowance

Whereas everyone seems to agree what a carbon allowance is. See for example https://www.4air.aero/whitepapers/allowances-vs-offsets Chidgk1 (talk) 18:14, 27 January 2023 (UTC)
 * I am not sure. Would the existing articles on carbon credit and carbon offset both be merged into "carbon allowance"? At this stage, the terms "carbon credit" and "carbon offset" seem to be the more familiar names (but they often seem to get mixed up in practice). We just have to make sure we follow WP:Commonname. - I have no fixed views on this and would be happy to learn by reading/following a discussion that might take place here. - Then there is also carbon budget which sounds similar to "carbon allowance" but it's a global level thing whereas carbon allowance would be at a smaller level, not global. EMsmile (talk) 13:56, 2 February 2023 (UTC)
 * I don’t propose to merge just move stuff to the correct article after the rename Chidgk1 (talk) 12:54, 3 February 2023 (UTC)

Proposal to Merge this Article and Carbon Offset Article
As part of the project “Improving communication of climate change knowledge through Wikipedia”, I would like to propose that this article and the carbon offset article be combined into one article, perhaps titled “Carbon offsets and credits”. Am posting this proposal to both this page and the carbon offset talk page.

Justification for Proposal
I’m suggesting this because:
 * As shown in the comparison outlines below, these two terms are often used interchangeably in these articles, and leads to confusion. This seems to be more common in the offset article, but it’s an issue with the credit article as well. A combined article that provides an overall definition of both terms, describes the common features (and differences) for them, and makes distinctions where they are appropriate, would provide a better overall coverage of this field.
 * The two topics have several features in common, such as: project type; key principles such as additionality; markets and regulatory drivers (there are distinctions here as well, of course); and criticisms (again also some distinctions too). However, the two articles provide different approaches in describing these common features. These need to be presented in a more consistent manner, ideally in one location.
 * Both articles need updating, as many of the references in more than 10 years old. Although some are still relevant, there is a lot of information developed over the past 10 years that should be incorporated into these articles, such as the developments around crediting and offset mechanisms under the Paris agreement, the role of net zero goals, as well as a variety of recent criticisms of both crediting schemes and voluntary offset projects.
 * These articles have a host of other issues that could be addressed at the same time – there are currently four maintenance templates in each article.
 * Below are outlines from the TOC for each article, I’ve tried to briefly summarize some key points about the contents and list, in italics, where each article is talking about credits, offsets, or both credits and offsets. There are also some italicized notes about issues such as maintenance templates.

Description of Proposal
Dtetta (talk) 20:14, 9 February 2023 (UTC)
 * I would propose to create a combined outline for both articles, and use the following definitions from Carbon Offset Guide as an inro concept. This description is also consistent with definitions from this Corporate Finance Institute webpage. From the offset guide: “A carbon offset broadly refers to a reduction in GHG emissions. . . that is used to compensate for emissions that occur elsewhere. A carbon offset credit is a transferrable instrument certified by governments or independent certification bodies to represent an emission reduction of one metric tonne of CO2, or an equivalent amount of other GHGs.” This is consistent with wording in the lead of carbon offset article, and roughly consistent with wording in the lead of the carbon credit article.
 * The combined article outline would then cover the main features, such as principles, project types, markets/drivers, and criticisms. Where there are differences between offsets and credits in one of these sections, that would be explained in the appropriate section. Similar to a recent proposal for revising the Carbon accounting article.
 * Prior to developing an outline, I wanted to see if there were strong concerns with combining the articles, or whether any of the information I have presented here seems off-base. Please let me know if you have questions or concerns about any of this., , and - pinging each of you, as it looks like you have been recent contributors to this page.
 * Thank you. I worry that the discussion might be spread over two pages so my suggestion is that the discussion about this proposal should take place on the talk page of carbon offset only (which is where I have just put my response). EMsmile (talk) 08:43, 10 February 2023 (UTC)
 * Thanks - I agree - now that the proposal has been presented on both pages, it makes more sense to have the discussion on one page. Just added a "Discussion" subsection to the post on the carbon offset talk page, so hopefully editors will post their comments there. Dtetta (talk) 15:25, 10 February 2023 (UTC)
 * I’ve nearly finished an outline for a combined article tentatively title “Carbon Offsets and credits” (still need to flesh out the “Recent Trends” section). It’s located at: User:Dtetta/Carbon offsets and credits. I posted some additional notes on the talk page of the “Carbon offsets” article, and suggest that the discussion of the combined article proposal continue to take place there. Dtetta (talk) 17:22, 4 March 2023 (UTC)
 * I've put my two cents worth here: https://en.wikipedia.org/wiki/Talk:Carbon_offset#Proposed_outline_for_combined_article EMsmile (talk) 12:36, 6 March 2023 (UTC)

Ready to merge articles
I have revised the offset article, and moved the portions of this article that seemed appropriate over to the offset article. Ready to close the discussion and determine consensus per section 2.4 of Merging. Would be interested in feedback on whether there is any material in this article that does not appear in the offset article, but should. So far it appears that and  support the merger proposal, as do I. Dtetta (talk) 02:39, 30 March 2023 (UTC)

, and  - you all have recently contributed to the article, so I would be interested in any feedback you have. Dtetta (talk) 02:47, 30 March 2023 (UTC)

Regarding carbon credits and carbon offsets, one needs to enquire with the UNFCCC about nomenclature and definitions. Philotrio (talk) 12:46, 30 March 2023 (UTC)


 * Thanks Philotrio. I scoured the AR6 Mitigation and Synthesis reports for mentions of these terms, and the reports are largely silent on this topic. There are a few brief mentions of carbon pricing in general, but not much. I did spend a good bit of time reviewing the literature for definitions for these topics, and also worked with Michael Gillenwater(Greenhouse Gas Management Institute) and Derik Broekhoff (Stockholm Environmental Institute), both internationally recognized for their expertise in this area, to get feedback about what should be covered in these articles. The text on definitions in the offset article is based in part on their recommendations. I have also described a list of all of their comments on the offset talk page. Hope that helps. Dtetta (talk) 15:59, 30 March 2023 (UTC)
 * I think the time has come to place the redirect tag at this article then. You've done all the necessary groundwork, Dtetta. EMsmile (talk) 07:15, 31 March 2023 (UTC)
 * Since both definitions are accepted (and may have had different origins) and similar meaning and usage, this may be mentioned and yes, it would be alright for both articles to remain on wiki and to include adequate cross references. Philotrio (talk) 10:36, 31 March 2023 (UTC)

Per Copying within Wikipedia these are the portions of the this article that I have copied, modified, and inserted into the Carbon offset article.
 * The second and third paragraphs of lead.
 * The one paragraph in the “Types” section.
 * The second paragraph and bullets from the “Kyoto’s flexible mechanisms” subsection.
 * The third paragraph of the “Emission markets” subsection.
 * The third paragraph of the “Creating carbon markets” subsection.
 * The first paragraph of the “Additionality and its importance” subsection. Dtetta (talk) 04:05, 1 April 2023 (UTC)
 * Housekeeping: Just to say that the merger has been completed now. EMsmile (talk) 13:40, 17 April 2023 (UTC)