Montreal Protocol
1987 treaty to protect the ozone layer
Summary
The Montreal Protocol, officially the Montreal Protocol on Substances That Deplete the Ozone Layer, is an international treaty designed to protect the ozone layer by phasing out the production of numerous substances that are responsible for ozone depletion. It was agreed on 16 September 1987, and entered into force on 1 January 1989. Since then it has undergone several amendments and adjustments, with revisions agreed to in 1990 (London), 1992 (Copenhagen), 1995 (Vienna), 1997 (Montreal), 1999 (Beijing), 2007 (Montreal), 2016 (Kigali) and 2018 (Quito).
Originally created by Pinkunicorn
9/5/2001, 6:30:18 PM
Modified
5/2/2026, 6:16:08 PM
Recent revisions
/* Terms and purposes */ clean up, replaced: achive → archive
Fixed a reference. Please see [[Category:CS1 errors: dates]].
Adding a reference
Adding a reference
Adding a reference
Adding a reference
Adding a reference
Add: doi-access, bibcode, authors 1-1. Removed URL that duplicated identifier. Removed parameters. Some additions/deletions were parameter name changes. | [[:en:WP:UCB|Use this bot]]. [[:en:WP:DBUG|Report bugs]]. | Suggested by Headbomb | #UCB_toolbar
Some citations, 2022 updates on ozone and HFCs
/* History */
+links in captions
+comma
infobox clean-up
[[Wikipedia:OABOT|Open access bot]]: url-access=subscription updated in citation with #oabot.
Fixed a reference. Please see [[Category:CS1 errors: dates]].
Removed unncessary content from the History section and added a 'see also'. Rephrased the top section and moved some content to Effect section. Rewrote the start of Terms and purposes section. Replaced "the treaty" with "the Protocol" throughout for consistency. Added citations. General edits for clarity.
Added a relevant reference to support a claim made in the article.
