Also, increased research on solar radiation management, means that our our understanding of the stratosphere and how to manipulate it is likely to increase, especially should we want to reverse any stratospheric injections. E.g. 2nd type of volc geoengineering we outline (below)

Lasty, the consistent threat of volcanoes, esp large eruptions (1 in 6 per century) that pose global catastrophic risks, means the question of whether we can intervene will keep arising. We support a proactive and informed debate before society tries anything in an emergency.