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2026 Antarctic Ozone Hole Shaped by Strong and Persistent Polar Vortex

Although the Antarctic ozone hole in 2026 was one of the ten largest recorded since scientists began monitoring it ne

KA@10 documentary

From ozone to action: A conversation with Meg Seki

From ozone to climate: A conversation on International Day of the Girl with Megumi Seki reflecting on a lifetime sha

Parties to the Montreal Protocol Advance with Key Discussions in Bangkok

17 JULY 2026 – At the forty eighth meeting of the Open ended Working Group (OEWG48) of the Parties to the Montreal Pr

The Kigali Amendment: An overview

The Kigali Amendment to the Montreal Protocol is a legally binding global agreement, which aims to phase down

International Day of Women and Girls in Science

International Day of Women and Girls in Science

“From vision to impact: Redefi

New sustainable cooling policy toolkit

Sustainable Cooling Policy Toolkit

The cooling sector—including refrigeration, air conditioning, and heat p

Montreal Protocol delegates discuss and adopt decisions to address ozone layer protection and other environmental challenges

BANGKOK, 5 NOVEMBER 2024 - Parties to the Vienna Convention and the Montreal Protocol and other stak

Montreal Protocol delegates replenish the Multilateral Fund and address emerging challenges

NAIROBI, 30 OCTOBER 2023 - Parties and other stakeholders convened for the Thirty-Fifth Meeting of t

Parties to the Montreal Protocol meet in Bangkok to prepare for key decisions to be taken in Nairobi

The forty-fifth meeting of the Open-ended Working Group (OEWG45) of the Parties to the Montreal Protocol on Substance

Montreal Protocol delegates meet again in person for the Thirty-Fourth Meeting of the Parties

MONTREAL 7 NOVEMBER 2022 - Parties and other stakeholders convened for the Thirty-Fourth Meeting of

Thirty-five years of successful ozone layer and climate protection

Montreal Protocol: Global cooperation protecting life on earth

Parties to the Vienna Convention and the Montreal Protocol meet and adopt 18 key decisions

Nairobi, 1 November 2021 – From 23 to 29 October 2021, parties and other stakeholders convened onlin

Parties to the Montreal Protocol continue online discussions on unexpected emissions of CFC-11 and energy efficiency

Nairobi, 20 July 2021 – From 14-17 July 2021, parties and other stakeholders to the Montreal Protoco

Parties to the Montreal Protocol make key decisions

What: Combined twelfth meeting of the Conference of the Parties (part I) and Thirty-Second Meeting o

Featured

Kigali Amendment Kigali Amendment
Montreal protocol progress
Kigali Amendment

The Kigali Amendment to the Montreal Protocol entered into force on 1 January 2019 after the threshold for the agreement to enter into force was met on 17 November 2017, when it was ratified by 20 parties.

Working towards climate neutrality Working towards climate neutrality
Greening the blue
Working towards climate neutrality

The Ozone Secretariat is part of the UN’s “Greening the Blue” efforts to move towards climate neutrality. The Secretariat works towards climate neutrality by measuring the carbon footprint of Vienna Convention and Montreal Protocol meetings ...