An even longer road to recovery?

Abstract

Atmosphere The ozone layer is on the path to recovery after concerted efforts to control the production of ozone-depleting substances under the Montreal Protocol. In the latter half of the 21st century, the ozone layer will be controlled mainly by atmospheric carbon dioxide concentrations. In a Perspective, Liang et al. explain that ozone layer recovery may slow down. This is because of incomplete compliance with the Montreal Protocol, rising emissions of ozone-depleting substances that are not controlled, and increasing emissions of natural ozone-destroying substances owing to climate change. Full recovery of the ozone layer to its 1980 state will require improved compliance with regulations and successful efforts to limit climate change. Science , this issue p. [1257][1] [1]: /lookup/doi/10.1126/science.aaq0145