I guess that's kind of what it is saying? An Ice Age would be about as bad for civilization as we know it as the ice caps melting (just in different ways), in

I guess that's kind of what it is saying? An Ice Age would be about as bad for civilization as we know it as the ice caps melting (just in different ways), in a time of global cooling, I suppose increased CO2 would keep the Earth warmer then the last ice age.