Speculations (The Climate) will consider the science, ethics, and politics of solar geoengineering, a set of technologies intended to reflect sunlight and reduce global warming, perhaps by injecting particles of sulfuric acid into the upper atmosphere. How much do we know about geoengineering’s climactic and social effects, and how does geoengineering fit into larger debates around climate change, the carbon economy, and global inequality? Participants include Holly Jean Buck, George Collins, and Christian Parenti.

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