If geoengineering could avoid a significant fraction of expected climate change damages with few or no side effects, it would be a phenomenally useful intervention for humanity. Indeed, given that today we’re contemplating carbon-cut policies that will cost hundreds of trillions of dollars yet do little to help, paying instead $0.009 trillion ($9 billion), as Copenhagen Consensus research suggests, to fix a significant part of climate change would leave an enormous amount of money available to do good in other ways.
