collective failure to lower emissions. And why Mary Ann Lucille Sering, climate change secretary for the Philippines, told the 2013 summit in Warsaw, Poland, “I am beginning to feel like we are negotiating on who is to live and who is to die.” Rob Nixon, an author and University of Wisconsin English professor, has evocatively described the brutality of climate change as a form of “slow violence”; geoengineering could well prove to be a tool to significantly speed that up.

