Montreal Protocol

environmental protocol designed to protect the ozone layer
Legislation treaty Q219438
Montreal Protocol
U.S. Department of State from United States · Public Domain · Wikimedia
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Montreal Protocol

Summary

Montreal Protocol is a treaty[1]. It ranks in the top 2% of treaty entities by monthly Wikipedia readership (442 views/month).[2]

Key Facts

  • Montreal Protocol is in the country of Canada[3].
  • Montreal Protocol's instance of is recorded as treaty[4].
  • Montreal Protocol's instance of is recorded as environmental protocol[5].
  • Montreal Protocol followed Vienna Convention for the Protection of the Ozone Layer[6].
  • The location of Montreal Protocol was Montreal[7].
  • Montreal Protocol's place of publication is recorded as Montreal[8].
  • Montreal Protocol's Commons category is recorded as Montreal Protocol[9].
  • Montreal Protocol's language of work or name is recorded as Chinese[10].
  • Montreal Protocol took place on September 16, 1987[11].
  • Montreal Protocol's main subject is ozone depletion[12].
  • Montreal Protocol's main subject is chlorofluorocarbon[13].
  • Montreal Protocol's main subject is international cooperation[14].
  • Montreal Protocol's work available at URL is recorded as https://ozone.unep.org/treaties/montreal-protocol/montreal-protocol-substances-deplete-ozone-layer[15].
  • Montreal Protocol's applies to jurisdiction is recorded as worldwide[16].
  • Montreal Protocol's different from is recorded as Montreal Convention[17].
  • Montreal Protocol's depositary is recorded as United Nations Secretary-General[18].
  • Montreal Protocol's amended by is recorded as Second Meeting of the Parties to the Montreal Protocol[19].
  • Montreal Protocol's amended by is recorded as Fourth Meeting of the Parties to the Montreal Protocol[20].
  • Montreal Protocol's amended by is recorded as Kigali Accord[21].
  • Montreal Protocol's supplement to is recorded as Vienna Convention for the Protection of the Ozone Layer[22].
  • Montreal Protocol's P14541 is recorded as 2u7WUo[23].
  • Montreal Protocol's P14541 is recorded as 3TNNVH[24].

Why It Matters

Montreal Protocol ranks in the top 2% of treaty entities by monthly Wikipedia readership (442 views/month).[2] It has Wikipedia articles in 28 language editions, a strong signal of global cultural recognition.[25] It is known by 52 alternative names across languages and contexts.[26]

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [3] . wikidata.org.
  2. [4] . wikidata.org.
  3. [5] . wikidata.org.
  4. [6] . wikidata.org.
  5. [7] . wikidata.org.
  6. [8] . wikidata.org.
  7. [9] . wikidata.org.
  8. [10] . wikidata.org.
  9. [11] . wikidata.org.
  10. [12] . wikidata.org.
  11. [13] . wikidata.org.
  12. [14] . wikidata.org.
  13. [15] . wikidata.org.
  14. [16] . wikidata.org.
  15. [17] . wikidata.org.
  16. [18] . wikidata.org.
  17. [19] . wikidata.org.
  18. [20] . wikidata.org.
  19. [21] . wikidata.org.
  20. [22] . wikidata.org.
  21. [23] . wikidata.org.
  22. [24] . wikidata.org.

Class ancestry

  1. [1] . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] . Wikimedia Foundation. dumps.wikimedia.org.
  2. [25] . Wikidata sitelinks. wikidata.org.
  3. [26] . Wikidata aliases. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). Montreal Protocol. Retrieved May 3, 2026, from https://4ort.xyz/entity/montreal-protocol
MLA “Montreal Protocol.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/montreal-protocol.
BibTeX @misc{4ortxyz_montreal-protocol_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Montreal Protocol}}, year = {2026}, url = {https://4ort.xyz/entity/montreal-protocol}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Montreal Protocol — https://4ort.xyz/entity/montreal-protocol (retrieved 2026-05-03)

Canonical URL: https://4ort.xyz/entity/montreal-protocol · Last refreshed:

Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 2d ago · Pmartinolli · 2026-08-31 view diff on Wikidata ↗
    Main subject ozone depletion, chlorofluorocarbon, international cooperation
    "/* wbsetclaim-create:2||1 */ [[Property:P921]]: [[Q9378718]]"
  2. 3d ago · Bouzinac · 2026-08-30 view diff on Wikidata ↗
    Country Canada
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/50828|batch #50828]]: deducted from P276"
  3. 10d ago · Carn · 2026-08-23 view diff on Wikidata ↗
    Work available at url https://ozone.unep.org/treaties/montreal-protocol/montreal-p
    "/* wbcreateclaim-create:1| */ [[Property:P953]]: https://ozone.unep.org/treaties/montreal-protocol/montreal-protocol-substances-deplete-ozone-layer, #quickstatements; #temporary_batch_1787476591515"
  4. 7w ago · Nyuhn · 2026-07-10 view diff on Wikidata ↗
    Main subject ozone depletion, chlorofluorocarbon, international cooperation
    Local thumb
    Language of work or name Chinese
    Applies to jurisdiction worldwide
    + 14 other properties edited (see Wikidata diff for full list)
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/40849|batch #40849]]: ZGBK ID"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.