Healing the Ozone Layer Through Diplomacy

The document highlights the Montreal Protocol as a successful model of multilateralism where science, diplomacy, and the private sector collaborated to phase out ozone-depleting substances (ODS). It details how the Protocol and its amendments, including the Kigali Amendment, have prevented millions of skin cancer cases and cataracts while providing significant climate co-benefits by reducing greenhouse gas emissions. The brief emphasizes the importance of differentiated responsibilities for developing countries and the role of political will and industry cooperation in achieving global environmental goals.

• The Montreal Protocol and the Vienna Convention have prevented significant public health crises, including the avoidance of 2 million skin cancer cases annually and 63 million additional cataract cases.
• The Montreal Protocol has provided substantial climate co-benefits; in 2010, emissions reductions were estimated between 9.7 and 12.5 gigatonnes of CO2 equivalent, which is five to six times the target of the Kyoto Protocol.
• The Kigali Amendment specifically targets hydrofluorocarbons (HFCs), which are potent greenhouse gases; its implementation could prevent 0.4°C of global warming by the year 2100.
• The Protocol ensures global compliance by recognizing 'common but differentiated responsibilities,' providing financial assistance to 'developing countries' (Article 5 parties) through the Multilateral Fund and allowing for different phase-out schedules.
• The ozone layer is projected to recover to pre-1980 levels at different times: by the 2030s for the northern hemisphere and mid-latitudes, by the 2050s for the southern hemisphere, and later this century for Antarctica.
• Despite overall success, challenges remain, including the need for cost-effective alternatives for 'essential use exemptions,' the continued use of HFCs, and the requirement to safely reclaim ODS from old equipment.

APA

Helfenstein,, K. (2021). Healing the Ozone Layer Through Diplomacy. International Institute for Sustainable Development. https://www.iisd.org/articles/healing-ozone-layer

Chicago

Helfenstein,, Kate. Healing the Ozone Layer Through Diplomacy. International Institute for Sustainable Development, 2021. https://www.iisd.org/articles/healing-ozone-layer.

Wikipedia

{{cite report |last1=Helfenstein, |first1=Kate |title=Healing the Ozone Layer Through Diplomacy |publisher=International Institute for Sustainable Development |date=13 September 2021 |url=https://www.iisd.org/articles/healing-ozone-layer |access-date=17 August 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{helfenstein2021healing, author = {Helfenstein,, Kate}, title = {{Healing the Ozone Layer Through Diplomacy}}, institution = {International Institute for Sustainable Development}, year = {2021}, month = sep, url = {https://www.iisd.org/articles/healing-ozone-layer}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }