The ecosphere has been around for billions of years. It's been through much much, MUCH worse. It'll be fine. Maybe some hairless apes might suffer a bit, and a few thousand species might be replaced by something else, but in the long run the planet is going to thrive.
This is normalcy bias. Since it’s worked out well so far, it’ll work out well in future. But there is a point of no return - if the concentration of atmospheric carbon exceeds a certain level, it will melt the ice caps, which will increase the temperature further, which will cause dissolved CO2 in the oceans to enter the atmosphere, which will … you get the idea. There’s a potential feedback loop at the end of which the planet becomes like Venus.
Not saying there won’t be life left on the planet even if it looks like Venus. Life is adaptable. But it wouldn’t flourish like it does today.
Is there any credible science indicating that "Earth turns into Venus" is even remotely possible if we were to deliberately put all our efforts into triggering it?
I've never heard this scenario from anyone who has spent any time reading the science. Unless you can give some details of why this is something that's worth having on the radar, I'm going to dismiss that scenario as a fear-mongering doomsday prediction.
I mean, I’m pretty concerned about the magnitude of suffering of those hairless apes. That seems like a sufficiently bad outcome to warrant a change in behavior and even doomsday rhetoric.
The ecosphere, yes, but I'm concerned about humanity specifically.
Also, it might be possible the same argument could hold for Venus. It probably thrived (at reasonable temperatures) for billions of years before it didn't.
