However, there are quasi-stable positions slightly sunward of L1 where you can balance these instabilities and actually use the solar sail effect for station keeping in a swarm. It would require launching a lot of rockets, but is entirely doable with today’s technology.
Not a scientist, but I’m still fascinated by this stuff.
The cost of that is going to be the big issue. No government is going to want to pay for routine shipments of fuel and parts to L1, which is expensive as hell. And I wouldn’t bet on international cooperation being a thing either. Each country is going to be too busy fighting over food and water, and keeping migration at bay.
Completely guessing here, it would probably be cheaper to raise the albedo of the planet through various means. Maybe including massive scale cloud seeding over the oceans. At least it’s on planet and therefore hypothetically can be done with minimal fossil fuel use. How to do that without fucking up the environment with chemicals for cloud nuclei is the hard part.
That, or intentionally inducing a light nuclear winter, ideally without the nuclear part. With enough particulates in the upper atmosphere, it would do the job. The tricky part is doing that without overdoing it. This is the dumb version, but it’s personally how I see things going. Especially because this is something a lone country could probably do on its own. China doesn’t want to deal with all the effects of climate change? They may light up a bunch of islands in the Pacific with nukes to “solve” it.
Another dumb option that might arise, a country intentionally trying to start another global pandemic to reduce emissions. Emissions dropped dlike a rock with COVID, and a lot of countries have the ability to produce bioweapons.
There are myriad of dumb, harmful, cheap ways that individual countries could use to curb climate change. The next few decades are going to be dangerous as hell.