1-1.5]
[1.1-1.4]
[1.3-1.5]
[1.2-1.5]
[1.5-1.8]
[1.5-1.8]
[1.5-1.7]
[1.5-2.0]
[1.9-2.5]
[2.4-2.9]
2.2
2.1
2.7
4
[0-10]
37
[18-59]
[83-98]
71
0
[0-0]
8
[2-18]
[53-88]
Category/
subset 
label 
limit 
warming 
to 1.5°C 
(>50%) 
with no 
or 
limited 
overshoot
…
with 
net zero 
GHGs 
… 
without 
net zero 
GHGs
return 
warming 
to 1.5°C 
(>50%) 
after a 
high 
overshoot
limit 
warming 
to 2°C 
(>67%) 
…
with 
action 
starting 
in 2020 
…
NDCs 
until 
2030 
limit
warming
to 2°C
(>50%)
limit
warming
to 2.5°C
(>50%)
limit
warming
to 3°C
(>50%)
[212]
Category 
(2) 
[# pathways]
C1
[97]
C1a
[50]
C1b
[47]
C2
[133]
C3
[311]
C3a 
[204]
C3b
[97]
C4
[159]
C5
C6
[97]
Table 3.1: Key characteristics of the modelled global emissions pathways. Summary of projected CO2 and GHG emissions, projected net zero timings and the resulting global 
warming outcomes. Pathways are categorised (columns), according to their likelihood of limiting warming to different peak warming levels (if peak temperature occurs before 2100) 
and 2100 warming levels.