Access Nature and 54 other Nature Portfolio journals
Get Nature+, our best-value online-access subscription
$29.99 / 30 days
cancel any time
Subscribe to this journal
Receive 51 print issues and online access
$199.00 per year
only $3.90 per issue
Rent or buy this article
Prices vary by article type
Prices may be subject to local taxes which are calculated during checkout
Nature 577, 464-466 (2020)
Updates & Corrections
Correction 04 February 2020: An earlier version of the graphic 'Secret stocks' erroneously stated that the unit for CFC-11 emissions was gigatons per year.
Montzka, S. A. et al. Nature 557, 413–417 (2018).
Rigby, M. et al. Nature 569, 546–550 (2019).