Overview
- Modeling by Lancaster University estimates about 335,500 tonnes of trifluoroacetic acid have been deposited globally from 2000 to 2022.
- Annual TFA deposition from atmospheric breakdown of HCFCs, HFCs and related gases rose from roughly 6,800 tonnes in 2000 to about 21,800 tonnes in 2022.
- The team concludes CFC replacements are the dominant atmospheric source, with modeling indicating that nearly all Arctic deposits originate from these gases.
- HFO-1234yf used in car air conditioning is highlighted as a growing contributor, producing around 10 times more TFA than the HFC it replaces.
- Scientists call for expanded monitoring and regulatory review, noting EU concern over aquatic toxicity, ongoing assessments of reproductive risks, and projections of further increases without changes in refrigerant choices.