Fig. 1: Illustration of three pathways to decarbonisation by 2050.
From: Adjusting 1.5 degree C climate change mitigation pathways in light of adverse new information

Pathway 1 (solid green line) represents an optimal pathway based on current knowledge, in which no new information is received. In light of receipt of new information in Global Stocktake (GST1) at end of 2023, pathway shifts to Pathway B in 2025, provided this is possible in light of preparatory actions before 2025. Similarly, in light of new information in GST2 (end of 2028), pathway shifts to Pathway C, provided preparatory actions enable this.