> Question, what are the most viable / cost effective / low risk geoengineering tools? Inject sulphur dioxide into the stratosphere. This can be done by adding

> Question, what are the most viable / cost effective / low risk geoengineering tools? Inject sulphur dioxide into the stratosphere. This can be done by adding it to airplane fuel. We have a good idea of the consequences, as ships did the ~same thing (less effectively) until recently—they're now filtering it into the oceans instead.