[badmadrad]

I don't have access to article but the keyword is "likely" in the abstract. And doesn't take away from the fact this article used a misleading video to bolster it's argument. Climate Change is real but understanding the impact is something that is still uncertain.

[astrodust]

What's uncertain is how apocalyptically bad it's going to be on a scale of "society collapses" to "everyone dies", plus when that's going to happen on a time scale of "ten years" to "two hundred years".

Every year they adjust their estimates things get worse.