In my experience, people only rally around a problem when faced with an immediate problem. It's probably irrelevant how you frame the issue because nothing will be done until it's juuuust about too late. The good news is humans are highly adaptable, the bad news is other species will suffer.
Actually, I'm probably wrong.... Too many people might be the root of the problem.
And that might be wrong too... Maybe it's just one more cycle Earth has to go through.