CHRISTY: Well, there's any number of things.

I suppose, fundamentally, it's the fact that someone is speaking about a science that I have been very heavily involved with and have labored so hard in, and been humiliated by, in the sense that the climate is so difficult to understand, Mother Nature is so complex, and so the uncertainties are great, and then to hear someone speak with such certainty and such confidence about what the climate is going to do is -- well, I suppose I could be kind and say, it's annoying to me.

O'BRIEN: But you just got through saying that the carbon dioxide levels are up. Temperatures are going up. There is a certain degree of certainty that goes along with that, right?

CHRISTY: Well, the carbon dioxide is going up. And remember that carbon dioxide is plant food in the fundamental sense. All of life depends on the fact carbon dioxide is in the atmosphere. So, we're fortunate it's not a toxic gas. But, on the other hand, what is the climate doing. And when we build -- and I'm one of the few people in the world that actually builds these climate data sets -- we don't see the catastrophic changes that are being promoted all over the place.

For example, I suppose CNN did not announce two weeks ago when the Antarctic sea ice extent reached its all-time maximum, even though, in the Arctic in the North Pole, it reached its all-time minimum.