The history of volc geoengineering has come with varying success and failures. But the geoethics of such decisionmaking has never been discussed. Many volcanologists support a precautionary approach, where deontological constraints weigh heavily over any benefits.

Though there is precedent for a more consequentialist approach, one that weighs potential positive and negative consequences equally (cost-benefit). One such incidence was the successful prevention of limnic (lake gas) eruptions in Cameroon. www.nature.com/articles/466...