Fig. 2: Predicted fraction of C4 plants across the globe over 2001–2016.

Model predictions using our simple C3/C4 approach, including both natural grasslands and croplands (a). Global C4 distribution maps from Still2009 (b) and Luo2024 (c).

Model predictions using our simple C3/C4 approach, including both natural grasslands and croplands (a). Global C4 distribution maps from Still2009 (b) and Luo2024 (c).