A decline in global CFC-11 emissions during 2018−2019

S. A. Montzka, G. S. Dutton, R. W. Portmann, Martyn P. Chipperfield, Sean Davis, Wuhu Feng, Alistair J. Manning, Eric Ray, Matthew Rigby, B. D. Hall, Carolina Siso, J. D. Nance, Paul B. Krummel, Jens Mühle, Dickon Young, Simon O’Doherty, Peter K. Salameh, Christina M. Harth, Ronald G. Prinn, Ray F. Weiss, James W. Elkins, Helen Walter-Terrinoni, Christina Theodoridi