Nature Climate Change 7, 38–43 (2017); published online 19 December 2016; corrected after print 1 February 2017.

In Fig. 1c of the original version of this Letter, the 2030 assessment of the NDC for the USA was misplotted. This changed the number of equity approaches that the USA's NDC was in line with. The figure and text that referred to the findings of that figure have been updated.