No, it's still if. Climate scientists are not seers. It's an if with bloody lot of concerning data points and estimates. If should be good enough to take action

No, it's still if. Climate scientists are not seers. It's an if with bloody lot of concerning data points and estimates. If should be good enough to take action. Currently we are running a global empirical experiment on what happens when we increase CO2 in the atmoshpere, and no one has any conclusive answer what will actually happen, given that Earht's weather is a highly complex dynamical system. Will the clathrate gun explode? What happens then? Who knows! Roll the dice, enjoy the show. Yeah, when we get to when it's too late.