Something I've been thinking about for a while now in relation to artificially cooling the earth: We all know that capitalists aren't going to do anything drastic to curb climate change until it starts affecting their profits, so realistically we're just going to be sitting on our asses about this issue until we're far past all points of no return for using renewables and long term policy decisions. At some point, what the article is suggesting, manipulating the amount of sunlight that reaches the surface of the earth in order to cool it off, is basically going to be our only realistic option for curbing the effects of rising temperatures.

So what are our options for actually doing that you might ask. Giant mirrors to reflect more light back out into space? A swarm of small mirror satellites that block/reflect light away from earth? Pumping other gases into the atmosphere that block/reflect sunlight? All theoretically possible, but in my opinion, the quickest, easiest, and most effective way we currently have of doing this are nuclear weapons. It's the same thinking behind nuclear winter: the vacuum created after a nuke goes off sucks a shitload of dirt and debris and throws it miles up into the atmosphere, and that debris acts in the same way as a volcano's ash plume to block sunlight. This means that theoretically, if we set off enough nukes across the entire globe at the same time, we could create an artificially volcanic ash cloud that cools off the earth temporarily, perhaps giving us more time to actually start doing things we should have started doing decades ago.

TL;DR: At some point, someone in a major position of power is going to seriously suggest causing a nuclear winter in order to fight climate change.