January 2009  |  Alan Robock, Allison Marquardt, Ben Kravitz, and Georgiy Stenchikov Department of Environmental Sciences, Rutgers University, New Brunswick, New Jersey

Here we evaluate several possible means of injecting the equivalent of 3-5 Tg SO2 per year into the lower Arctic or tropical stratosphere. We assess airplanes, balloons, artillery shells, and space elevators from the viewpoint of cost and possible speed of application.

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