imagine a scenario in which men like Trump, Indian prime minister Narendra Modi, and North Korea’s “Supreme Leader” Kim Jong-un were empowered to deploy these climate-altering technologies like unconventional weapons, hurtling us into an era of undeclared weather wars in which one country sacrifices the precipitation of another in order to save its crops, and the other retaliates by unleashing mega-floods. Some would-be planet hackers insist that these worst-case risks can be managed (though they never explain how). All concede to lesser downsides, however. Spraying sulfur dioxide into the
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