[oAlbe]

> In the early 1990s, anthropogenic sulfur dominated in the Northern Hemisphere, where only 16% of annual sulfur emissions were natural, yet amounted for less than half of the emissions in the Southern Hemisphere.

> Such an increase in sulfate aerosol emissions had a variety of effects. At the time, the most visible one was acid rain, caused by precipitation from clouds carrying high concentrations of sulfate aerosols in the troposphere. At its peak, acid rain has eliminated brook trout and some other fish species and insect life from lakes and streams in geographically sensitive areas, such as Adirondack Mountains in the United States. Acid rain worsens soil function as some of its microbiota is lost and heavy metals like aluminium are mobilized (spread more easily) while essential nutrients and minerals such as magnesium can leach away because of the same. Ultimately, plants unable to tolerate lowered pH are killed, with montane forests being some of the worst-affected ecosystems due to their regular exposure to sulfate-carrying fog at high altitudes.[1]

Sure, let's have ~2 years of that.

[1] https://en.m.wikipedia.org/wiki/Sulfur_dioxide

[BurningFrog]

The way to do it is to release the SO2 directly into the stratosphere, where it stays for ~2 years, and does not affect rain, which happens far below.

[Turskarama]

One of the risks of a strategy like this is that we become reliant on it and use it as an excuse to solve the actual problem slower. Then if there's ever any disruption to SO2 production we get 20 years of warming all at once that we otherwise might have worked to avoid.

Betting on never having a disruption to that supply seems high risk to me.