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Is the human economy happening on some other planet I'm not aware of?

CO2 emissions in excess compared to recent time (what seems to be happening) "harm" the natural equilibrium with the result that some (many) things on the planet (humans but not only) can't adapt fast enough.

If you consider the planet just as a big rock orbiting the star, doubt that anything we can do at this point will make a difference.

CO2 is highly soluble in water - on the order of one unit volume per one unit volume at standard pressure. This has been having devastating effects on ocean life.

The framing should be that CO2 emissions destroy the very foundations of our life.

That's exactly what they said about oxygen emissions.

https://en.wikipedia.org/wiki/Great_Oxidation_Event

Ah yes, the majestic human goal of paving the way for whatever comes next.

I suppose Singularitarians have that goal, but I don't think they see pushing the environment away from human beneficial conditions as meaningful progress.

Did you miss the context of this subthread? My point was to agree with one of the (grand)*parent posts that it's still a human-specific matter.