Probably not, but geoengineering in some form is going to be necessary to address climate change.
Much of the world’s economic elite is literally invested in a low-carbon future. We are not on track to phase out fossil fuels at the speed necessary for meeting the IPCC’s goals. But the path of least resistance is no longer an indefinite extension of the carbon economy. There is little risk that increasing public investment into the research and development of geoengineering techniques will lead the world to abandon decarbonization.
This reality complicates efforts to limit global warming. After all, decarbonization requires shuttering coal plants, getting diesel trucks off the road, and lowering emissions from cargo ships, airplanes, and other industrial sectors. And yet, the more we eliminate such sources of air pollution, the fewer aerosols there will be in the atmosphere. This is because, unlike carbon, sulfur dioxide tends to fall out of the stratosphere within two years of its emission.
Thus, intentionally injecting sulfur dioxide into the stratosphere is quite plausibly a precondition for keeping future warming within tolerable bounds, at least until global decarbonization has been fully achieved.
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