Aw, c'mon. We've had 'tipping points' come and go for years. That's why the whole scare campaign (and yes, the alarmists have said they they are trying to scare societies into action) is failing. Remember the 'hockey stick' and other projections of warming? All wrong; discredited. The 'science was settled' - remember? Until they discovered it wasn't. Now they are down to "measuring" 'global temperatures' to the nearest 1/100th of a degree, but in reality its just presenting a result of a computer model.
And who is doing 'nothing'? In Australia we are have met all the United Nations type 'targets' and moving on to more. Its just that we aren't adopting the extreme position advocated by the de-industrialisation Greens.
The alarmists have shot themselves (and their cause) in the foot by exaggerating their case, presenting themselves as morally superior and bullying and denigrating anyone who opposes their view. Oh, that and rank hypocrisy (do what I say, not as I do) by the likes of climate zealot Steggall, Hollywood celebrities, the Greens and the likes of Al Gore.