The worst thing about climate change is we don’t know exactly how it’s going to act. We have some idea but nature is a fickle thing. Some scientists believe that we’re already beginning to pass some tipping points but it’s important to remember that this is speculation and not an excuse not to take action.
One theory is that climate change will act like dominoes where one event will trigger another which in turn will make things worse, quickly. Like quickly melting ice that pushes the sea level higher much faster than we would like.
But this is still speculation. Even if things have gotten past the point of no return, we can still act to reduce harm and limit the future damage that we do. Pushing against climate change isn’t a zero sum game and we can always work at keeping things from getting worse.