As an anarchist who would welcome other anarchists - sadly, I doubt if that’s a reliable recipe to stop climate change.

Limiting (hopefully stopping) climate change can be done under almost any political system… except perhaps dictatorial petro-states. However, it takes years of work to tranform the economy. Transport, heating, food production - many things must change. Perhaps the simplest individual choices are:

• going vegetarian (vegan if one knows enough to do the trick)
• avoidance of using fossil fueled invidual vehicles
• improving home energy efficiency (especially in terms of heating)
• avoidance of air travel
• avoidance of heavy goods delivered from distant lands

The rest - creating infrastructure to produce energy cleanly and store sufficient quantities - are typically societal choices.

As for corals - I would start by preserving their biodiversity, sampling the genes of all species and growing many of them in human-made habitats. If we’re about to cause their extinction, it’s our obligation to provide them life support until the environment has been fixed.

Also, I would consider genetically engineering corals to tolerate higher temperatures. If that’s feasible. Also, I would keep in mind that this could have side effects, so maybe I wouldn’t prefer this as plan A.

As for tempeature - it will be rising for some time before things can be stopped. Short of geoengineering, nothing to be done but reduce emissions, adapt, and help others adapt.