Our previous work showed how global emissions of CFC-11 rose, starting in 2013, and that a substantial fraction of these emissions originated from eastern China. In two new papers, we show, using atmospheric observations, that these signals have now reversed. Montzka et al. (2021) uses measurements in the background atmosphere to show a rapid reduction in global emissions in 2019, and Park et al. (2021) identifies a coincident decline from China.
Further details are available on the University of Bristol and NASA news pages, and elsewhere.