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.

Weatherwatch: Repair of ozone layer is making the planet warmer, study finds

Scientists say ozone is warming Earth by 40% more than expected but that repair is still right thing to do

The repair of the Earth’s #OzoneLayer has been a success, but a new study reveals a downside: #ozone is warming the planet up to 40% more than originally anticipated.

Bill Collins from the University of Reading and his colleagues used a computer model to project the amount of warming associated with changes in ozone between 2015 and 2050, taking into account changes in humidity, clouds and surface reflectivity. If we continue to implement the air pollution controls mandated by the Montreal protocol in 1987 their results, which are published in Atmospheric Chemistry and Physics, suggest that the healing of the ozone layer will create more warming, cancelling out most of the #climate benefits from stopping production of ozone destroying chemicals such as #CFC's and #HCFC's.

By 2050 they estimate that ozone will be the second-largest contributor to warming after #CarbonDioxide.

https://www.theguardian.com/news/2025/sep/04/weatherwatch-repair-of-ozone-layer-is-making-the-planet-warmer-study-finds

#ClimateScience
#ClimateCrisis
#MontrealProtocol
#GlobalWarming

@coleens_ lets just say the #MontrealProtocol was successful because the #decisionmakers of it's time would've felt the alternative within very few years and in their #lifetime.

• Unlike say #ClimateChange which the global #gerontocracy won't live long enough to suffer under!

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

#Environment

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