Description: Originally climate but increasingly Law.
Taking science by the throat...
In the real world, pretty well everything is non-linear. So saying that the impacts of GW are non-linear is trivial and uninteresting , in and of itself. People segue far too casually from "non-linear" (trivial) to "thresholds exist" (largely undemonstrated) to "we're passing those thresholds and terrible things are happening" ( using insurance in the US as an example is a terrible idea because the markey is so heavily distorted by regulation and govt intervention that market prices often don't apply).
Thresholds are lovely things in simple theoretical models but I think less applicable to the real world. Everything is fuzzy, distributed: there are rarely absolute thresholds.