[Winse]

I breathe fine in my greenhouse at 800–1,000 ppm all the time...so ...meh

[layer8]

I feel the urge to open a window at those levels. I wouldn’t want to live in a world where that’s the base level.

[Winse]

you probably won't ever live in world where that's the base level: https://www.climate.gov/news-features/understanding-climate/....

[layer8]

Obviously, as I won’t be alive anymore by the end of the century. I was responding to your suggestion of a “beautiful warm catastrophe/boon” due to high CO2 levels. I don’t see the boon.