In pathways 
that limit warming to 1.5°C (>50%) with no or limited overshoot, net 
global GHG emissions are projected to fall by 43 [34 to 60]%143 below 
2019 levels by 2030, 60 [49 to 77]% by 2035, 69 [58 to 90]% by 2040 
and 84 [73 to 98]% by 2050 (high conﬁdence) (Section 2.3.1, Table 2.2, 
Figure 2.5, Table 3.1)144. Global modelled pathways that limit warming 
to 2°C (>67%) have reductions in GHG emissions below 2019 levels 
of 21 [1 to 42]% by 2030, 35 [22 to 55] % by 2035, 46 [34 to 63] 
% by 2040 and 64 [53 to 77]% by 2050145 (high conﬁdence). Global 
GHG emissions associated with NDCs announced prior to COP26 would 
make it likely that warming would exceed 1.5°C (high conﬁdence) 
and limiting warming to 2°C (>67%) would then imply a rapid 
acceleration of emission reductions during 2030–2050, around 
70% faster than in pathways where immediate action is taken to 
limit warming to 2°C (>67%) (medium conﬁdence) (Section 2.3.1) 
Continued investments in unabated high-emitting infrastructure146 and 
limited development and deployment of low-emitting alternatives 
prior to 2030 would act as barriers to this acceleration and increase 
feasibility risks (high confidence). {WGIII SPM B.6.3, WGIII 3.5.2, 
WGIII SPM B.6, WGIII SPM B.6., WGIII SPM C.1, WGIII SPM C1.1, 
WGIII Table SPM.2} (Cross-Section Box.2)
Deep, rapid, and sustained mitigation and accelerated implementation of adaptation reduces the risks of climate 
change for humans and ecosystems.