..."danger which could bring the end of civilisation."
Gore in Hay climate change plea (BBC News) is saying that climate change could bring the end of civilization. He's right. Just as when I say it is going to rain. Sooner or later it will rain. Sooner or, probably, later so will climate change as it likely has in the past it will affect all that we humans do here. Well, he's not exactly right. It will likely change civilization as we know it and in unpredictable ways. That we might all be destroyed by climate change or that we can affect climate change rates or cycles is unproven but likely untrue except to most minor degree. Just too many other variables over which we have no control such as the sun's temperature, Earth's pattern of axis tipping or orbits of the Sun.
So, what is this all about. It is really about Al Gore. He wants the limelight, power, self-actualization and doesn't care at whose expense he achieves that/those goals.