US EditionIndustrial Chemical Leaks Could Delay Ozone Recovery by 7 Years, Study Finds
Researchers found feedstock leakage is about 3.6%, far above the 0.5% assumption, and could add 300 million metric tons of carbon dioxide equivalents yearly by mid-century.
- On Thursday, April 16, 2026, a study published in Nature Communications found that industrial feedstock emissions are delaying stratospheric ozone recovery by about seven years, pushing full restoration to 2073.
- The 1987 Montreal Protocol exempted chemical feedstocks based on industry assumptions that only 0.5 percent would escape into the atmosphere, yet new measurements reveal actual leakage rates are closer to 3.6 percent.
- These feedstock chemicals act as powerful greenhouse gases, widely used to manufacture plastics and electric vehicle batteries; emissions are projected to reach around 300 million metric tons of CO2-equivalent annually by mid-century.
- Lead author Stefan Reimann, an atmospheric scientist, stated, "We wanted to raise the warning flag that something is wrong here," urging industry to either swap out chemicals or reduce leakage during production.
- Member countries of the Montreal Protocol meet annually to address emerging issues, with future summits likely prioritizing strategies to reduce feedstock leaks and help the ozone layer reclaim its 1980 health status.
10 Articles
10 Articles
MIT scientists just found a hidden problem slowing the ozone comeback
The ozone layer has been on track to recover thanks to the Montreal Protocol—but a loophole may be holding it back. Chemicals still permitted for industrial use are leaking into the atmosphere at higher rates than expected. Scientists now estimate this could delay ozone recovery by up to seven years. Closing this gap could speed up healing and reduce harmful UV exposure worldwide.
A regulatory loophole could delay ozone recovery by years
Often hailed as the most successful international environmental agreement of all time, the 1987 Montreal Protocol continues to successfully phase out the global production of chemicals that were creating a growing hole in the ozone layer, causing skin cancer and other adverse health effects.
Continuing industrial emissions are delaying the recovery of the stratospheric ozone layer - Nature Communications
The Montreal Protocol on Substances that Deplete the Ozone Layer has greatly restricted the global production and consumption of long-lived ozone-depleting substances (ODS). However, ODS used or consumed as feedstocks in the manufacture of other chemicals are excluded from restrictions. This exclusion was based on the assumption that emission rates of feedstocks were only 0.5% of the amount produced and that feedstock production would decline in…
Researchers at the Massachusetts Institute of Technology (MIT) have identified a problem that could delay the recovery of the ozone layer. Although the Montreal Protocol promoted the reduction of ozone-depleting substances, new evidence suggests that leaks of industrial chemicals are occurring at higher rates than expected. This phenomenon could postpone ozone recovery by up to seven years. Impact of industrial emissions on ozone recovery Emissi…
Coverage Details
Bias Distribution
- 100% of the sources are Center
Factuality
To view factuality data please Upgrade to Premium
