Waltham: Massachusetts: We're currently experiencing one of the most severe and widespread global heatwaves on record. Such extreme weather events are often cited as justification for considering solar radiation modification (SRM), a.k.a. solar geoengineering.
UNEP defines SRM as 'a set of speculative methods designed to reflect sunlight and temporarily cool the Earth'. Climate models suggest that SRM could reduce global temperatures. But deploying it on a climatically meaningful scale would require an unprecedented logistical effort.
