IGSD · Montreal Protocol Analytics · 10 Year Anniversary

Montreal Protocol Agreement Dashboard

An analysis of how 198 Parties agreed to the Montreal Protocol and its five Amendments (6 instruments total) — tracking the pace, method, and leadership of global ozone protection from 1987 to 2025.

Total Parties (MP)
Instruments
Kigali Agreements
Years Covered
01 —

Cumulative Momentum Across Instruments

Year-by-year cumulative agreement counts for each instrument, derived from each party's first agreement date (across Ratification, Acceptance, Approval, Accession, Succession).

Cumulative Party Agreements Over Time

Comparative uptake curves for MP (1987), London, Copenhagen, Montreal, Beijing, and Kigali.
02 —

Kigali: Pace and Methods

Stacked annual contributions by A5 and non-A5 parties plus method split for Kigali agreements.

New Kigali Agreements Per Year

Stacked bars: A5 vs non-A5 counts by year.

Kigali Method Breakdown

Breakdown by legal method of first Kigali agreement.
03 —

First Movers and Group Profile

Earliest 30 Kigali parties and cross-instrument A5/non-A5 participation comparison.

First 30 Kigali Parties to Agree

Ordered by first agreement date.

A5 vs non-A5 by Instrument

Count of parties per instrument by group.

Kigali Agreement Coverage by Group

Ratified/agreed vs not yet agreed, by group.

Method Evolution Across Instruments

Stacked method composition by instrument.
04 —

Kigali World Map

World map colored by the order bucket in which each party joined Kigali. The projection is centered away from a US-centric view for publication balance.

World Map: Kigali Agreement Order Buckets

Buckets: 1-5, 6-10, 11-23, 24-50, 51-100, 101-150, 151+.
05 —

Leadership Ranking and Key Insights

Score definition: Ratification=3, Acceptance/Approval=2, Accession/Succession=1. Ranking is computed across all six instruments.

Top 30 Parties by Weighted Commitment Score

Sorted by score (desc), amendments covered (desc), then country.
#CountryGroupInstrumentsScore/18