We should be clear that no realistic scenario of climate change would lead to direct threat to “long-term survival of the species”. Any scenario in which climate change act as an ultimate cause that leads to threats to survival of species requires a chain of proximal contingent causes.
So investing on thwarting these more proximal contingent causes is likely a more effective approach to avoid the unlikely threat to long-term survival of the species than investing all resources on reversing the climate change.
So investing on thwarting these more proximal contingent causes is likely a more effective approach to avoid the unlikely threat to long-term survival of the species than investing all resources on reversing the climate change.