Geoengineering in any form looks downright dangerous to Colby College historian James Fleming, whose latest book is Fixing the Sky: The Checkered History of Weather and Climate Control. Fleming does not mince words: “Geoengineering is in fact untested and dangerous. We don’t understand it, we can’t test it on smaller than planetary scales, and we don’t have the political capital, wisdom, or will to govern it. Planetary tinkering is not ‘cheap,’ as some economists claim, since the side effects are unknown. It poses a moral hazard by possibly reducing incentives to mitigate. It could be attempted unilaterally, or worse, proliferate among rogue states, and . . . learning from history, it would be militarized. Geoengineering could violate a number of existing treaties.”
— Quoting Christopher Cokinos in The American Scholar (Autumn 2010).