Fig. 1.

Impact on global ozone from future emissions of N2O and the sum of halocarbons covered by the Montreal Protocol (after Daniel et al. 2010; from UNEP 2013, Fig. 2.3 and used with permission). The figure shows that eliminating N₂O emissions after 2010 would lead to a 4 Dobson Unit (DU) increase in global average total ozone by 2100, or about 1.25% of the average value of 300 DU. Eliminating halocarbon emissions after 2010 has a small impact by 2100 because these emissions were nearly all phased out before 2010