Some scientists estimate that if we could prevent 1% of all sunlight from reaching the earth, we could offset the effects of all global warming that has taken place since the beginning of the industrial revolution. Global warming? No problem! Block out the sun!
While steering a recent UN report on warming away from the role of emissions, the US wants to include provisions for plans to install giant space mirrors in the atmosphere as “insurance.” Alternatives include floating bajillions of shiny balloons, or injecting the atmosphere with reflective droplets that would mimic the cooling effect of a massive volcanic eruption.
Of course it’s good to be thinking through all possibilities and preparing for last-ditch scenarios, but to emphasize post-facto band-aid solutions while de-emphasizing root causes is both foolhardy and arrogant. And therefore not surprising.