They've been at it for over a hundred years, they just can't make up their minds whether the world is cooling or warming, but it's catastrophic nonetheless. Commonsense should have told them by now that the climate is always in flux. Don't they realize that the fact that the ice ages ended, meant that the world got quite a bit warmer. Good thing too. The only thing that is certain, is that the climate will change more. We should see a period of colling soon, maybe if we forget long enough, they will spring the 'nuclear winter' fear on us again.