I don't know much about spaceflight, but with SpaceX's rapidly reducing the cost of launching objects into orbit, would it make sense to block some small % of heat/radiation from the sun with mirrors or shades? We could use the LaGrange point or could focus on blocking light hitting the poles, to decelerate ice loss there? I wonder when that cooling would make sense financially and how it would be enacted.
Probably plausible; that's basically what happens with the particulate matter from volcanic activity just on a finer scale i think.
On the flip side if we had a big volcanic eruption do we have any way to scrub particulate matter on a large enough scale to prevent catastrophic cooling?
