Environment & Energy

It pushed up lots of calcium carbonate that absorbs co2. That shift happened over a much longer time frame than our co2 increase. With that life had time to adjust and evolve. Our best chance is artificial snow in the northern and southern areas to increase the albedo, the Earth's ability to reflect sunlight back. We face the risk of actual environmental collapse ontop of social collapse. Worst case fear is the methane hydrate in the arctic ocean triggering runaway warming leading to the oceans them selves evaporating. That happened in the Pemerin Extinction. These shifts can happen over very short timeframes, like 12 to 15 years.

https://arctic-news.blogspot.com/p/runaway-warming.html?m=1