Should we use the argument of a threat to human survival as a reason to change the consent rule?

The general principle underlying treaty law is that states must consent to a treaty before being bound to it. However, increasingly there are global problems which need to be addressed globally. This means that ALL states must participate in the treaty regime. For instance, with climate change, the non participation of major greenhouse gas emitting states will harm the entire international community.

Should we use the argument of a threat to human survival as a reason to change the consent rule? If yes, name two specific areas where you see the need for such a change.