The Point of No Return

I keep reading that there's kind of the windows closing, that if it goes much longer, there's a point of no return. Well, the very long answer is we got here by burning a hell of a lot of coal and gas and oil and putting a lot of carbon in the atmosphere. But the slightly shorter answer is we really got in trouble when we ignored the clear warnings from scientists 30, 35 years ago. I don't think we're going to go past a point where there's nothing that can be done to keep things from getting worse.