I would be very carefull with any climate intervention where there is no easy way to adjust the effect. Preferably whatever we do should be part of a designed-in feedback loop to stabilize the climate.
You wouldn’t bash in a window at work if the office is too hot. It is super easy to see that that is a hard to undo intervention you might regret later. The climate of a whole planet is much more complex than that, much less well understood and we only have one. Be suspicious of any plan which doesn’t have “knobs” we can adjust as we learn more.
Also we now maybe have the tech to make moon trebuches to fling dirt to shade our planet. Do we have the tech to clean it up too if it blows back in our face? Will we always have the tech? Civilization is not a straight linear progression. Even if we could do the adjustment now who knows maybe thousands of years from now humanity won’t be able to do the same. So it is better if we design our interventions such that they are making the climate stable even without continous tweeking by a technologically advanced civilization. I don’t know how this would be possible without properly designed feedback loops. And I don’t know what feedback system a dust cloud could have.
You wouldn’t bash in a window at work if the office is too hot. It is super easy to see that that is a hard to undo intervention you might regret later. The climate of a whole planet is much more complex than that, much less well understood and we only have one. Be suspicious of any plan which doesn’t have “knobs” we can adjust as we learn more.
Also we now maybe have the tech to make moon trebuches to fling dirt to shade our planet. Do we have the tech to clean it up too if it blows back in our face? Will we always have the tech? Civilization is not a straight linear progression. Even if we could do the adjustment now who knows maybe thousands of years from now humanity won’t be able to do the same. So it is better if we design our interventions such that they are making the climate stable even without continous tweeking by a technologically advanced civilization. I don’t know how this would be possible without properly designed feedback loops. And I don’t know what feedback system a dust cloud could have.