Banning CFCs perhaps?

If you want to go older and more localised you could look at forestry and fisheries laws. Sometimes we self-regulate and form a stable state, other times we over-extract until collapse

I wouldn’t underestimate human ingenuity when there is a clear problem. Things like this, it’s still hypothetical. Climate scientists can raise the alarm or whatever but have no credibility, certainly not when the proposed solution is some kind of global authoritarian communism, and it always is.

I’m upset that we don’t put more into carbon capture and other technological solutions now and waste all our time on some proxy political battle, but that’s where we are. When things get really bad we will build a solution.

I.E. avoiding population collapse due to lack of ecosystem carrying capacity? Eliminating famine? etc.