I&#x27;m afraid it&#x27;s probably <i>more</i> necessary then, because you need sound justification for any action to be taken. I have to admit - I use models in my day job, and I&#x27;m nervous about binding law and treaties based on them.<p>And I don&#x27;t see any projections where <i>total</i> loss of habitat is on the table. It&#x27;ll be more like Mesa Verde, where pre-Industrial warming presumably rendered the home of the Anasazi uninhabitable. Even them that&#x27;s 100 years out.