Well, now the cat is out of the bag...

"Without urgent action to accelerate decarbonisation, remove carbon from the atmosphere and repair nature, the plausible worst-case hit to global economies would be 50% in the two decades before 2090, the IFoA report said."

https://www.theguardian.com/environment/2025/jan/16/economic-growth-could-fall-50-over-20-years-from-climate-shocks-say-actuaries