SRM has the potential to offset warming within one or two decades 
and ameliorate some climate hazards but would not restore climate to 
a previous state, and substantial residual or overcompensating climate 
change would occur at regional and seasonal scales (high conﬁdence). 
Effects of SRM would depend on the speciﬁc approach used122, and 
a sudden and sustained termination of SRM in a high CO2 emissions 
scenario would cause rapid climate change (high conﬁdence). SRM 
would not stop atmospheric CO2 concentrations from increasing nor 
reduce resulting ocean acidiﬁcation under continued anthropogenic 
emissions (high conﬁdence). Large uncertainties and knowledge 
gaps are associated with the potential of SRM approaches to reduce 
climate change risks. Lack of robust and formal SRM governance 
poses risks as deployment by a limited number of states could create 
international tensions. {WGI 4.6; WGII SPM B.5.5; WGIII 14.4.5.1; 
WGIII 14 Cross-Working Group Box Solar Radiation Modification; 
SR1.5 SPM C.1.4}
122 Several SRM approaches have been proposed, including stratospheric aerosol injection, marine cloud brightening, ground-based albedo modiﬁcations, and ocean albedo change. 
See Annex I: Glossary.