> It appears that stratospheric aerosol injection, at a moderate intensity, could counter most changes to temperature and precipitation, take effect rapidly, have low direct implementation costs, and be reversible in its direct climatic effects.[2]

That last little bit scares me. Whenever I see "yeah nah we can totally reverse it", all I can imagine is that it's something we'll do carelessly and excessively, with no ability to reverse it within our lifetimes.