{WGI SPM B.1.1, WGI Table SPM.1, WGI Figure 
SPM.4} (Cross-Section Box.2 Figure 1)
Modelled pathways consistent with the continuation of policies 
implemented by the end of 2020 lead to global warming of 
3.2 [2.2 to 3.5]°C (5–95% range) by 2100 (medium conﬁdence) 
(see also Section 2.3.1). Pathways of >4°C (≥50%) by 2100 would 
imply a reversal of current technology and/or mitigation policy trends 
(medium conﬁdence). However, such warming could occur in emissions 
pathways consistent with policies implemented by the end of 2020 if 
climate sensitivity or carbon cycle feedbacks are higher than the best 
estimate (high conﬁdence). {WGIII SPM C.1.3}
112  Understanding of climate processes, the instrumental record, paleoclimates and model-based emergent constraints (see Annex I: Glossary). {WGI SPM footnote 21}
113 The best estimates [and very likely ranges] for the different scenarios are: 1.4 [1.0 to 1.8]°C (SSP1-1.9); 1.8 [1.3 to 2.4]°C (SSP1-2.6); 2.7 [2.1 to 3.5]°C (SSP2-4.5); 3.6 [2.8 to 4.6]°C 
(SSP3-7.0); and 4.4 [3.3 to 5.7]°C (SSP5-8.5).