[tremon]

Unfortunately, there's an incredibly huge gap between "loss of coastal regions" and "Earth becomes a second Venus"

And you are basing this on what, exactly? Because the answer right now to that question is "we don't know how huge that gap is". And we do not have a second Earth to test your theories on. Are you really willing to take the risk of assured doom based on your belief that "the gap between now and assured doom is incredibly huge"?

Here's the thing with dynamic equilibrium: it is only locally stable. We do not know how exactly how resilient our ecosystem or our planet is to rapid changes. Some of us are not willing to find out, because we only have a single destructive test at our disposal.

[themckman]

> And you are basing this on what, exactly?

I made that statement based on my limited ability to extrapolate how our species might deal with the two scenarios. It sounds much, much easier to me, while still being incredibly challenging, to deal with large population displacement versus dealing with our planet becoming entirely uninhabitable.

Now, if I understand what you're saying, it sounds like our understanding of the probabilities of the two scenarios occurring isn't exactly known. While the two scenarios, at face value, sound incredibly different (to me at least), the likelihood of one happening over the other could be very similar. I agree that we should absolutely take that position seriously and that we should absolutely do things to guard against the possible outcome where our planet becomes uninhabitable.

All that I'm asking is that we say it like that. Lets say that instead of speaking in absolutes (e.g. "its a hoax", "we're doomed"). That's all I'm taking issue with. It doesn't help the discussion no matter what side of the argument those kinds of statements come from.

> And we do not have a second Earth to test your theories on. Are you really willing to take the risk of assured doom based on your belief that "the gap between now and assured doom is incredibly huge"?

To be clear, I don't have any theories I'd like to test nor do I know what I might be willing to risk. As I said in my original comment, my understanding of everything is incredibly rudimentary and I'm trying to do a better job seeking information to help me answer questions like that.

[Mithaldu]

> if I understand what you're saying, it sounds like our understanding of the probabilities of the two scenarios occurring isn't exactly known

Incorrect.

A complete planet-devastating runaway scenario is much more likely, as it requires merely that humans continue to operate as they are doing right this very moment.

The best case scenario only comes about if we get our shit together.

That's the gap that separates worst and best case: Humans change nothing <---> Humans make a supreme effort. Probabilities follow directly from the probabilities of these two things.

Sorry for not having stated that clearly.

[tremon]

Now, if I understand what you're saying, it sounds like our understanding of the probabilities of the two scenarios occurring isn't exactly known

No, what I'm saying is that we don't even know whether these really are two separate scenarios. We can't afford to plan for a large population displacement because by the time we get to that point, there may be nothing we can do to prevent our planet from becoming uninhabitable.