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Montreal Protocol - UNEP OzonAction Overview
webFrequently referenced in AI governance discussions as an analogy for international coordination on global technological risks; useful background for understanding multilateral treaty models that AI safety researchers propose adapting.
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Summary
This UNEP page provides an overview of the Montreal Protocol, the landmark 1987 international treaty that successfully phased out ozone-depleting substances. It serves as a reference case study in successful global environmental governance and multilateral coordination, often cited as a model for addressing other global risks including climate change and potentially AI governance.
Key Points
- •The Montreal Protocol (1987) is widely considered the most successful international environmental agreement, achieving near-universal ratification.
- •It demonstrates that global coordination on a complex technical risk is achievable when scientific consensus is clear and economic incentives align.
- •The protocol's adaptive governance structure allowed for amendments as new scientific evidence emerged, showing iterative policy refinement.
- •Often cited as a precedent for how international bodies might govern emerging global risks, including AI and advanced technologies.
- •UNEP's OzonAction program supports developing nations in implementing the protocol, illustrating the importance of capacity-building in global governance.
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- [Who we are](https://www.unep.org/ozonaction/who-we-are)
- [What we do](https://www.unep.org/ozonaction/what-we-do)
- [Networks](https://www.unep.org/ozonaction/networks)
- [News](https://www.unep.org/ozonaction/news)
- [Events](https://www.unep.org/ozonaction/events)
- [Resources](https://www.unep.org/ozonaction/resources)
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# About Montreal Protocol
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### The Montreal Protocol
The Montreal Protocol on Substances that Deplete the Ozone Layer is the landmark multilateral environmental agreement that regulates the production and consumption of nearly 100 man-made chemicals referred to as ozone depleting substances (ODS). When released into the atmosphere, those chemicals damage the stratospheric ozone layer, Earth’s protective shield that protects humans and the environment from harmful levels of ultraviolet radiation from the sun. Adopted on 16 September 1987, the Protocol is to date one of the rare treaties to achieve universal ratification.
The Montreal Protocol phases down the consumption and production of the different ODS in a step-wise manner, with different timetables for developed and developing countries (referred to as “Article 5 countries”). Under this treaty, all parties have specific responsibilities related to the phase out of the different groups of ODS, control of ODS trade, annual reporting of data, national licensing systems to control ODS imports and exports, and other matters. Developing and developed countries have equal but differentiated responsibilities, but most importantly, both groups of countries have binding, time-targeted, and measurable commitments.
The Protocol includes provisions related to Control Measur
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