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If This Were to Be Played Upon the Stage, I Would Condemn It at Once as an Improbable Fiction...

Robert Waldmann's Realpolitik: Beat China and India with an Eighteen-Mile Long Sulfur-Filled Rubber Hose...

Hoisted from comments: A recommendation for "harsh measures" from Robert Waldmann:

Ken Caldeira on Levitt and Dubner and Geoengineering: That's an excellent interview [with Caldeira]. On the other hand, I think we are getting close to the point where we ought to let Caldeira get back to doing research.

I would like to focus on one point "China or India then went into a decade or two of deep drought." That is not just a scary story Caldeira pulled out of his hat. Simulations tend to suggest that SO2 geoengineering will cause reduced precipitation in India and China. To be very very frank, I think that there is a silver lining to that cloudlessness. A big global warming problem is getting China and India on board. If, say, the USA could honestly say:

that's a nice monsoon you have there. It would be a pity if something were to happen to it.

Oh and by the way, we really really don't want to send SO2 into the stratosphere, because it might cause you a terrible drought. But if we see no alternative way to fight global warming, we might feel forced to send the SO2 up the tubes and hope for the best."

I'd say the effect on geopolitics is a feature not a bug of SO2 geoengineering research.

My personal position is that China and India are poor, so rich countries should pay all of the costs of reducing their emissions. But that's not going to happen is it? Might as well put our faith in global cooling ponies. So I conclude that threatening them with an 18 mile long tube is third best.