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Actually, yes. Casey Handmer has done the numbers on geoengineering, and it's feasible as a stopgap measure. In the article below scroll down to the section on

• onlyrealcuzzo 3y ago
  We're basically in an ice age.
• tremon 3y ago
  Those suggestions (launching stratospheric SO2 and grinding up basalt rock for CO2 absorption) sound a lot more mature to me than the ideas in TFA. However, when he talks about deployment at-scale the ideas are starting to sound as fantastic as the salty clouds in TFA. And dumping the rock flour near-shore as he suggests ("shallow oceans") seems tantamount to ecocide on the entire marine ecosystem. Maybe that's just a me-problem, or a problem of mankind in general: the volumes and scales we're talking about (2 teraton of CO2!) just don't fit in my mind, so any solution at that scale likewise is incomprehensible to me. Then again, we only needed 200 years to produce it, so given our technological advancements, maybe it's not impossible to solve it in two decades. I don't hold much hope though. The same government/industrial forces that delayed preventative action by 40 years will also delay restorative action, by probably the same number of years. There will be unforeseen consequences, either way. And millions will die, either way.