Between 2015 and 2019, a divergence was found between the global emissions derived from atmospheric observations and those expected from reported abatement, highlighting insufficient implementation of abatement strategies.
Our inferred HFC-23/HCFC-22 emission factor of 0.19% broadly fits within the emission factor considered practicable for abatement projects, demonstrating the potential for substantial reductions in global emissions.
The operation of appropriate destruction technology has the potential to reduce global HFC-23 emissions by at least 84%, equivalent to 17% of CO2 emissions from aviation in 2019.
Our findings stress the importance of the 2016 Kigali Amendment obligating parties to destroy HFC-23 emissions 'to the extent practicable' from facilities manufacturing hydrochlorofluorocarbons from 2020 onwards.
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