[kkfx]

It's not a matter of design, such ideas, similar to "in-space shields" and so one are childish ideas by some grown but not really grown mentally, children.

Can theoretically reflect Sun light? Of course yes. On scale? NO. We can't build a multi-million square km mirror in space, we can't spray gazillion of tons "powder" of any kind in the sky and so on.

Oh, surely when we start to experimenting fly most people say "that's impossible, a childish dream" BUT such experiments do take scale into account. Even in the recent past with experiments like lowering the sea level in the Mediterranean or re-fertilize again central Asia (also ignoring the vast amount of salty land there) was reasoned on scale and dropped because at scale they are simply absurd.

Having loss too much culture in reformed education systems to produce Ford model workers "useful idiots" in the ancient Greek language we are now unable to distinguish between "crazy but perhaps possible" and "childish dreams".