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Information on the state of the ozone layer and measure from the damaging ultraviolet radiation.
The World Meteorological Organization has issued its annual WMO Ozone and UV Bulletin, with information on the state of the ozone layer and on measures to protect human health and the environment from damaging ultraviolet radiation.
99% of ozone depleting chemicals have been plased out.
This year’s World Ozone Day (WOD) theme – Montreal Protocol: fixing the ozone layer and reducing climate change – reminds us of our responsibility to continue building on the considerable ozone and climate benefits already achieved under the Montreal Protocol through the phase-out of ozone depleting substances
MONTREAL PROTOCOL: Fixing the ozone layer and reducing climate change.
10% of all global electricity consumed is for cooling.
Benefits of cooling efficiency and the Kigali Amendment.
Action under the Kigali Amendment to the Montreal Protocol on Substances that Destroy the Ozone Layer (Montreal Protocol) will phase-down the production and use of hydrofluorocarbons (HFCs) and could avoid up to 0.4°C of global warming by 2100.
In a warming world, prosperity and civilization depend more on access to cooling.i The growing demand for cooling will contribute significantly to climate change. This is from both the emissions of HFCs and other refrigerants and CO2 and black carbon emissions from the mostly fossil fuel-based energy powering air conditioners and other cooling equipment.
These emissions are particularly dominant during periods of peak power demand, which are increasingly determined by demand for air conditioning. As the climate warms, the growing demand for cooling is creating more warming in a destructive feedback loop.
By combining energy efficiency improvements with the transition away from super-polluting refrigerants, the world could avoid cumulative greenhouse gas emissions of up to 210-460 gigatonnes of carbon dioxide equivalent (GtCO2e) over the next four decades, depending on future rates of decarbonisation. This is roughly equal to 4-8 years of total annual global greenhouse gas emissions, based on 2018 levels.
Cooling Emissions and Policy Synthesis Report.
Climate-friendly cooling could cut years of greenhouse gas emissions and save trillions of dollars - News from the International Energy Agen
WORLD OZONE DAY 2023 Theme: MONTREAL PROTOCOL: Fixing the ozone layer and reducing climate change.
Materials for use in World Ozone Day celebrations.
Regional Art Contests: The regional contests in Asia-Pacific and Latin America and the Caribbean were designed to increase public awareness of the Montreal Protocol and theKigali Amendment to protect the ozone layer and combat accelerated climate change.
The Artwork of the winners of the Latin America and the Caribbean art contest organized between October 2022 – March 2023, may be used in other regions for awareness purposes. The artwork is available at: The Planet is Your Canvas
The Artwork of the winners of the Asia Pacific Regional Ozone2Climate Art contest organized between September 2021 – March 2022, can also be used by other regions for awareness purposes. The artwork is available at the Hall of Fame. These are suitable for outreach to the public.
How to set up and manage logbooks or refrigeration, air-conditioning, heat pump and other types of equipment: This technical brief reflects the Polish experience of setting up and managing logbooks for refrigeration, air-conditioning, heat pump (RACHP) and other typesof equipment. It also provides examples of similar equipment databases used in other developed and developing countries. This is suitable for outreach to the RAC servicing technicians and RAC associations.
Watch out for Illegal Trade of HCFCs and HFCs: Lessons learnt from the Global Montreal Protocol Award for Customs and Enforcement Officers. This publication provides an analysis of the cases submitted in the context of the Global Montreal Protocol Award for Customs and Enforcement Officers. This is suitable for outreach to the Customs and enforcement community.
Considerations for Establishing National HFC Quota System: The Parties to the Kigali Amendment need to establish a mechanism to effectively control the production and consumption of hydrofluorocarbons (HFCs), a group of greenhouse gases that are controlled under the Montreal Protocol. Like the hydrochlorofluorocarbon (HCFC) phase-out, an effective quota system can play a vital role in assisting Parties to be in compliance with their HFC consumption targets. This is suitable for outreach to NOU staff, other government agencies and other stakeholders involved in the licensing and quotas process.
Five Posters on the Kigali Amendment: OzonAction developed five related posters for different target audiences, with the following slogans: 1. Let´s change this; 2. Make the right decision; 3. Let´s continue working for our planet; 4. For an increasingly sustainable planet; and Keep them cool without warming the planet. The posters are available in English, French, Russian and Spanish. This is suitable for outreach to the general public and the key Montreal Protocol stakeholders
Every Action Counts: Kigali Amendment: This brochure targets the general public and explains in a simplified manner what the Montreal Protocol and its Kigali Amendment signify. It includes some actions that everybody can do to support the Kigali Amendment. It also covers the relationship between the Kigali Amendment and Sustainable Development Goals. It introduces some examples of successful communication campaigns on the Kigali Amendment. This is suitable for outreach to the general public and the key Montreal Protocol stakeholders.
Women in Cooling: A Worldwide Survey: To better understand the background, motivation, challenges, and opportunities faced by women working in RACHP a worldwide survey was undertaken by the International Institute of Refrigeration (IIR) and UNEP OzonAction in cooperation with several partners. This is suitable for outreach to RAC servicing technicians, RAC associations, education and training stakeholders, Government gender departments, and the general public.
Gender Mainstreaming in the Montreal Protocol: Experiences in Latin America and the Caribbean: OzonAction in Latin America and the Caribbean has prepared this publication contextualizing the international legal framework and the instruments available regarding rights, gender, and equality aspects, in order to give visibility to the actions, good practices and progress achieved in a non-exhaustive group of countries of the region. This is suitable for outreach to the general public, the key Montreal Protocol stakeholders, Other government agencies, Government gender departments, and the general public.
Poster on Gender Mainstreaming in Montreal Protocol: OzonAction has developed a poster on gender mainstreaming which is available in English, French and Spanish. This is suitable for outreach to the general public and the key Montreal Protocol stakeholders
Statement from Inger Andersen, UNEP Executive Director on World Ozone Day 2023; September 16th.
Dear National Ozone Officers,
On 16 September each year, we all celebrate the commitments made by Parties in 1987 to protect human life and the environment by implementing the Montreal Protocol on Substances that Deplete the Ozone Layer.
This year’s World Ozone Day (WOD) theme – Montreal Protocol: fixing the ozone layer and reducing climate change – reminds us of our responsibility to continue building on the considerable ozone and climate benefits already achieved under the Montreal Protocol through the phase-out of ozone depleting substances, by enthusiastically pursuing the objectives of the Kigali Amendment to phase down HFC production and consumption. World Ozone Day provides an excellent opportunity to outreach the successes and new developments of the Montreal Protocol and to increase support for your national compliance strategy among the public and key stakeholder groups.
With the COVID-19 pandemic now officially over, this year countries can now celebrate WOD more fully and raise awareness about the Montreal Protocol achievements with a wider audience. OzonAction is pleased to provide you with the information resources listed below that can be used as part of your national celebrations (all items can be downloaded). Please also refer to the Ozone Secretariat’s WOD website for other related resources.
We would appreciate receiving information or reports about your country's WOD activities for posting on our website. Please send this information to your Montreal Protocol Regional Coordinator or directly to Ms. Jo Chona at [email protected].
It is our sincere hope that the Network and thematic meetings, information and awareness resources, compliance assistance, and project support that OzonAction’s Compliance Assistance Programme (CAP) teams provide are helping you and the members of your National Ozone Unit to deliver your country’s Montreal Protocol compliance strategy and programme more effectively.
Once again, we thank you for your ongoing commitment to maintaining compliance with the Montreal Protocol and your excellent work in implementing your national strategies and projects. On behalf of the entire OzonAction CAP team, I wish you great success in this year's WOD celebrations!
Yours sincerely,
James S. Curlin Head, OzonAction Branch UNEP Law Division
Let’s harness the spirit of the Vienna Convention and the Montreal Protocol to build a world where humans, nature and the planet thrive together.
Limiting the rise in global temperature to 1.5°Celsius is still possible if we immediately and drastically accelerate climate action. United Nations Secretary-General on World Ozone Day 2023
UNEP is an Implementing Agency of the Multilateral Fund for the Implementation of the Montreal Protocol.
Visualizing the Ozone Hole.
This activity will introduce students to the use of color maps to visualize data about stratospheric ozone. Scientists use colors and other representations for data to help interpret and visualize information. Data are mapped to colors and other representations to help the mind interpret this information. Sometimes this means creating an image that looks much like an aerial photo of the planet’s surface, but other data are best mapped to a color scale. In this lesson, students will discover that selecting a good color scale is both essential to understanding data and to accurately communicating science. Objectives After completing this activity, students should be able to • describe why color maps are used to visualize data • interpret data using a color mapped image • compare and evaluate different color scales
Standards (Grades 9-12) NGSS: Practice 4 Analyzing and Interpreting Data AAAS: 12E/H2 Check graphs to see that they do not misrepresent results by using inappropriate scales. AAAS: 11C/H4 Graphs and equations are useful ways for depicting and analyzing patterns of change. NSES: Unifying Concepts and Processes Standard: Evidence, models, and explanation. NSES: Content Standard E: Understandings about science and technology Engage Ask questions about the front of the poster. When was the ozone hole the smallest? (1979) When did the ozone hole grow the fastest? (1981–1985, pattern of growth, no shrinking) What year had the largest ozone hole? (2006) Ask students to provide evidence for their answers. (the graph, the globes, the colors) Ask how these helped answer the questions. Explore Using the “Color by Number” worksheet, ask students to create a visual representation that accurately communicates the size of the ozone hole. Invite students to make up their own color scale. The seven ranges of ozone data may be divided any way they like. Ranges don’t have to start at zero and don’t have to be even units. They can choose any colors or shades of colors they like. If only one student is participating, color two maps with different scales. Encourage students to think about the range and why they choose it. Explain Post drawings on the wall and compare. Do any look like there is almost no hole? Which one is easiest to understand? Why? Hardest to understand? Why? Why not use the same color for all types of data? Explain how the different color scales help us to visualize data by drawing attention to what is important, such as the location of the ozone hole. However, color can also be deceptive, such as a break in a color scale that stands out where there is nothing really unique about the data. Evaluate Looking back at the poster, ask students “Why was this particular color scale chosen?” (There is a noticeable break from light to dark blue at 220 DU, where values lower than 220 DU are considered to be the “ozone hole.”) Ask students to think about their scales and describe why they choose certain colors and data ranges. Which data were emphasized or de-emphasized in their color maps? Extension For extended activities, additional resources, and adaptations for other grades, visit
Montreal Protocol@35: global cooperation protecting life on earth.
The theme for the International Day for the Preservation of the Ozone Layer 2022, to be marked on 16 September, is Montreal Protocol@35: global cooperation protecting life on earth.
The theme recognises the wider impact the Montreal Protocol has on climate change and the need to act in collaboration, forge partnerships and develop global cooperation to address climate challenges and protect life on earth for future generations.
In a human lifetime, the mid-thirties can be a time of reflection: to think about what we have achieved and look ahead to what more we can accomplish. It is no different for the Montreal Protocol to Protect the Ozone Layer, the most successful environmental treaty to date.
As the treaty turns 35 on World Ozone Day, we will remember how the Montreal Protocol ended one of the biggest threats ever to face humanity as a whole: the depletion of the ozone layer. When the world found out that ozone-depleting gases used in aerosols and cooling were creating a hole in the sky, they came together. They showed that multilateralism and effective global cooperation worked and they phased out these gases. Now the ozone layer is healing, allowing it once again to shield humanity from the sun’s ultraviolet radiation.
This action has protected millions of people from skin cancer and cataracts over the years since. It allowed vital ecosystems to survive and thrive. It safeguarded life on Earth. And it slowed climate change: if ozone-depleting chemicals had not been banned, we would be looking at a global temperature rise of an additional 2.5°C by the end of this century. This would have been a catastrophe.
In the year of Stockholm+50, marking five decades since the landmark conference that kick-started today’s environmental global movement, the Montreal Protocol has much more to give. Under the Kigali Amendment, nations have committed to phase down hydrofluorocarbons – a move that could avoid up to 0.4°C of global temperature rise by the end of the century. The Protocol and its Amendment are helping the world adopt climate friendly and energy-efficient cooling technology.
What does this mean for humanity? As we continue to protect the ozone layer, it will continue to safeguard us and all life on Earth. It also means a cooler planet as more countries ratify the Amendment. It means more people being able to access vital cooling technology without further warming the planet. It also means the Protocol continuing to send a clear and lasting message: global cooperation to protect life on Earth is our best chance at a brighter future for everyone.
Global cooperation protecting life on earth.
