No, they arnt.
Discussion
Don’t cry little buddy. Read this Harvard paper instead. 🙂
Im not crying. Maybe you need to learn to read. How is doing climate modelling on the effect of SRM prove that they have been doing it all this time…
What do you think Stratospheric Aerosol Injection is there little angry bobble head doll? Could it be high elevation aircraft spraying chemical aerosols in the stratosphere?
For more angry bobble head fun, find out when that process was patented, and when testing started.
Now go fight reality with your weird anger elsewhere. muting.
Almost all work to date on stratospheric sulfate injection has been limited to modeling and laboratory work.[citation needed] In 2009, a Russian team tested aerosol formation in the lower troposphere using helicopters.[131] In 2015, David Keith and Gernot Wagner described a potential field experiment, the Stratospheric Controlled Perturbation Experiment (SCoPEx), using stratospheric calcium carbonate[132] injection,[133] but as of October 2020 the time and place had not yet been determined.[134][135] SCoPEx is in part funded by Bill Gates.[136][137] Sir David King, a former chief scientific adviser to the government of the United Kingdom, stated that SCoPEX and Gates' plans to dim the sun with calcium carbonate could have disastrous effects.
If those chemtrails (which are far too low to have the desired effect) were sulphur dioxide you would know it from the smell.