Regional activties is a huge factor, much bigger than global imo.
For example, South China Sea coastlines from Vietnam and China side are basically completely dead. There zero ocean environmental awareness in both countries and it's all about just devouring all ocean creatures with no self awareness.
This is especially apparent if you take a look at the other side of the same sea. Philipines coasts are absolutely beautiful, full of life (well as much as you can get these days). Huge conservation efforts and really strong indigenous culture that respects the ocean made much more difference than global warming ever could.
Completely different views from two vastly different regional activities.
Yeah this is always my worry about the global warming debate. It's a crisis for sure but there are so many local initiatives that can be taken around ecosystem protection that are cheap and don't require national decision-making to be effective. They won't stop global warming but they will increase local resilience (and beauty).