Chemikalien, die zum Schutz unserer Ozonschicht eingeführt wurden (FCKW-Ersatz), hatten die unbeabsichtigte Folge, dass riesige Mengen einer potenziell giftigen „ewigen Chemikalie“ rund um den Globus verbreitet wurden
https://www.lancaster.ac.uk/sci-tech/about-us/news/cfc-replacements-behind-hundreds-of-thousands-of-tonnes-of-global-forever-chemical-pollution
9 Kommentare
>Atmospheric scientists, led by researchers at Lancaster University, have for the first time calculated that CFC replacement chemicals and anaesthetics are behind around a third of a million tonnes (335,500 tonnes) of a persistent forever chemical called trifluoroacetic acid (TFA) being deposited from the atmosphere across the Earth’s surface between the years 2000 and 2022.
>
>And the rate of TFA entering the environment from these sources is continuing to grow as some of these CFC replacements survive for decades in our atmosphere, with peak annual TFA production from these sources estimated to be anywhere from between 2025 and 2100.
>
>Scientists behind the new study, published in the journal Geophysical Research Letters, used ‘chemical transport’ modelling, which simulates how chemicals move about and change in the atmosphere.
>
>Their model quantified TFA pollution created by the breakdown in the atmosphere of hydrochlorofluorocarbons (HCFCs) and hydrofluorocarbons (HFCs), which are used in refrigeration, as well as chemicals used as inhalation anaesthetics.
[Growth in Production and Environmental Deposition of Trifluoroacetic Acid Due To Long‐Lived CFC Replacements and Anesthetics – Hart – 2026 – Geophysical Research Letters – Wiley Online Library](https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2025GL119216)
One step forward for the ozone, two steps back for the water table. We’re essentially trading a temporary atmospheric crisis for a permanent geological one. ‚Forever chemicals‘ is such an ominous term, but it’s becoming the defining legacy of 20th-century chemistry.
Unintended, or just not considered?
„Although these chemicals (known as F-gases) are being phased out (following the Montreal Protocol and the later Kigali Amendment) their presence is still increasing in the atmosphere.“
I’m reading this correctly, and not missing anything else, that the concern in the article is basically already dealt with? The chemicals are still there, but we’re stopping the use of them?
Who knew the highlander was a documentary.
Brought in from where exactly?
„Potentially toxic“?
Are they known to be dangerous or is this just fear mongering?
I was reading the link and couldn’t find where it says how these chemicals were released into the atmosphere. Does anyone here know?
Damned if you do. Damned if you don’t.