In this Article, owing to an error in the production process, the units of the scales in Figs. 3 and 4 should be ‘GJ m−2’ rather than ‘GJ mol−2’. In addition, the units on the x axis in Fig. 2b should be ‘(×1016 mol)’ rather than ‘(×1017 mol)’. The original Article has been corrected online.
ASJC Scopus subject areas