The Montreal Protocol that banned ozone-depleting chemicals excepted carbon tetrachloride and other chemicals used as feedstocks for production of other substances, assuming that their usage would stay low and decline. However, atmospheric concentrations of these feedstocks are increasing, delaying recovery of the ozone hole.
Summary: https://www.sciencedaily.com/releases/2026/04/260416071945.htm
Original paper: https://www.nature.com/articles/s41467-026-70533-w
Why we gave up #hairspray!
The #ozone layer above the Arctic has thickened https://www.thebarentsobserver.com/news/the-ozone-layer-above-the-arctic-has-thickened/437130
#climateaction #environment #globalwarming #MontrealProtocol #ParisAgreement
Today is a good day. Today is the birthday of the Montréal Protocol.
Adopted on September 16, 1987, and ratified by every UN-member state, this landmark treaty stands as the shining example of what humans can achieve when science, diplomacy, and collective action unite for our common good.
A mere 10-15 years after researchers had come to a consensus that chlorofluorocarbons (CFCs) were the cause of an expanding hole in the #ozone layer, international diplomacy defeated corporate interests in a battle for our future.
CFC emissions were reduced and eventually banned. The result of the Protocol is an ozone layer hole recovering, no longer expanding.
But aside from the tangible outcome, this day is about what the Montréal Protocol represents: facing uncomfortable truths, recognising the urgency, setting selfish interests aside in the pursuit of shared interests.
It’s #solidarity. We did it once, we can do it again.
Enjoy your #MontrealProtocol day, everyone.
Proof that #EnvironmentalPolicy works: "During the peak of #ozone depletion season, the 2024 area of the #OzoneHole ranked the seventh smallest since recovery began in 1992, when the #MontrealProtocol, a landmark international agreement to phase out ozone-depleting chemicals, began to take effect."
https://www.earthobservatory.nasa.gov/images/153523/ozone-hole-continues-healing-in-2024
@animalculum @GhostOnTheHalfShell
#ozone #MontrealProtocol
Oh, No!
You're mistaken. We canned hairspray in the 80s and it's all fixed now.
Ozone Hole Continues Healing in 2024 https://earthobservatory.nasa.gov/images/153523/ozone-hole-continues-healing-in-2024
"During the peak of #ozone depletion season from September 7 through October 13, the 2024 area of the ozone hole ranked the seventh smallest since recovery began in 1992, when the #MontrealProtocol, a landmark international agreement to phase out ozone-depleting chemicals, began to take effect"
"We need to initiate discussions as soon as possible. With space debris, it took us 20 or 30 years to define a solution. With [the satellite air pollution] problem, if we move on the same kind of timescale, it might be too late."
https://www.space.com/montreal-protocol-satellites-air-pollution
#Satellites #Space #Geoengineering #MontrealProtocol #Environment #SpaceSustainability #Aerosols
Might have gone unnoticed among all the bad news these days: the #OzoneHole over #Antarctica is on a good track to recovery. We might be back to 1980s conditions around the 2060s.
Thanks to the #MontrealProtocol, the most successful environmental agreement ever!
https://wmo.int/media/news/wmo-ozone-and-uv-bulletin-published-world-ozone-day
The WMO Ozone and UV Bulletin explores the role of meteorological conditions and a major volcanic eruption on the Antarctic ozone hole in 2023, whilst highlighting growing evidence that the ozone layer is indeed on track to long-term recovery. Atmospheric abundances of tropospheric chlorine and bromine from long-lived ozone-depleting substances have continued to decline, it says.
RDN
Tom Zijlstra
Kathy Bryson
δανσω
Chris Mills
Dr. John Barentine FRAS
`Da Elf
Lukas VFN 🇪🇺
Dietrich Feist