In the 1980s, I recall that discussions within the the International Panel on Climate Change (IPCC) regarded injection of aerosols into the upper stratosphere to have the most favorable potential for stabilizing and bring down global warming. https://en.wikipedia.org/wiki/Stratospheric_aerosol_injection]
The injection of methyl sulfide is a convenient approach to use a gas as a precusor to the fomation of submicrometer droplets to scatter sunlight away from the Earth. Methyl sulfide (or other sulfide gases) can be transferred by aircraft and titrated in sequential doses over periods of years to allow the benefit to be steadly approached. The small sulfuric acid droplets would have a half-life of about 1 year, ultimately falling out of the stratosphere. The quantify of sulfur (as sulfate) added to the troposphere and ultamately depositing on the Earh's surface is tiny compared to sulfur injected from anthropogenic sources into the lower troposhere.
Still, to this day, injection of sulfide gases into the upper stratosphere is a leading candidate for gradually reducing global warming with the most reliable control of the rate.
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