Iran Makes Significant Strides in Reducing Ozone-Depleting Substances

In a remarkable achievement, Iran has successfully reduced harmful UV radiation emissions through the ozone layer, thanks to collaborative efforts from both national and global institutions. Shina Ansari, the head of the Department of Environment (DOE), highlighted these accomplishments during her speech on the International Day for the Preservation of the Ozone Layer, celebrated on September 16. This significant milestone reflects Iran’s commitment to environmental protection and aligns with the global goal of mitigating climate change.

According to Ansari, “I appreciate the government for approving the Kigali Amendment, the ratification of which is also being pursued by the Majlis (parliament),” as reported by IRNA. The Kigali Amendment is crucial as it mandates a phase-down in the production and use of hydrofluorocarbons (HFCs), which are potent greenhouse gases contributing to climate change.

Here are some key points regarding Iran’s efforts and commitments:

• Iran ratified the Vienna Convention and the Montreal Protocol in 1989.
• Subsequent amendments include the London and Copenhagen Amendments in 1996, the Montreal Amendment in 2007, and the Beijing Amendment in 2011.
• The Kigali Amendment was adopted in 2016 and aims to phase down HFCs.
• To date, 190 countries have ratified the Kigali Amendment.

During her address, Ansari emphasized the global responsibility of protecting the environment, stating, “Understanding the significance of preserving the ozone layer, Iran committed to playing an active role in the area two years after the adoption of the Vienna and Montreal Protocols.” This commitment illustrates that humanity’s future transcends geographical, cultural, and racial barriers.

With 198 parties having ratified the ozone treaty, it stands as one of the few agreements to achieve universal ratification in United Nations history. Ansari noted, “Over the past years, and by January 1, Iran has succeeded in eliminating imports of ozone-depleting gases and substances, eliminating more than 5.67 percent of hydrofluorocarbons.” She called for continued efforts to protect the ozone layer, expressing hope for a safer planet for future generations.

Understanding Harmful Chemicals

Numerous chemicals have been identified as detrimental to the ozone layer. Among them, halocarbons—compounds where carbon atoms are bonded to halogen atoms (like fluorine, chlorine, bromine, or iodine)—are particularly harmful. Notably, halocarbons containing bromine possess a significantly higher ozone-depleting potential (ODP) compared to those with chlorine.

Several man-made chemicals have contributed to ozone depletion, including:

• Methyl bromide
• Methyl chloroform
• Carbon tetrachloride
• Halons
• Chlorofluorocarbons (CFCs)
• Hydrochlorofluorocarbons (HCFCs)

In response to these threats, nations united under the Vienna Convention for the Protection of the Ozone Layer, agreeing to implement protective measures against harmful UV radiation resulting from a compromised ozone layer. Their collective action culminated in the adoption of the Montreal Protocol, which initiated the phase-out of chlorofluorocarbons, chemicals widely used in refrigeration, aerosol sprays, and foam production.

Progress and Future Outlook

Recent assessments by the World Meteorological Organization (WMO) in September 2024 suggest that the ozone layer is on track for long-term recovery. UN Secretary-General António Guterres remarked, “The ozone layer, once an ailing patient, is on the road to recovery. At a time when multilateralism is under severe strain, the Montreal Protocol to help protect the ozone layer stands out as a powerful symbol of hope.”

If current policies remain in effect, projections indicate that:

• The ozone layer is expected to return to 1980 levels by approximately 2066 over Antarctica.
• Recovery over the Arctic is anticipated by 2045.
• The rest of the world could see recovery by 2040.

This year’s International Day for the Preservation of the Ozone Layer not only celebrates these historic achievements but also sets the stage for continued action over the next forty years. The Montreal Protocol and the Vienna Convention are vital for monitoring ozone and UV radiation levels, as well as for managing ozone-depleting substances and the phased reduction of greenhouse gases like HFCs under the Kigali Amendment.

Ultimately, the ozone treaties exemplify the journey from science to global action, showcasing the power of international collaboration in tackling environmental challenges. As we move forward, these frameworks will remain integral to our ongoing efforts to protect the planet.