Fred Thompson on global warming

Here:

THOMPSON: Well, that's one of the questions we don't know, the last one that you just asked. There's no question in my mind that the world is warming. There's no question that humans are making some contribution to that. But there's a lot of answers that we don't have yet, Alan, that we need to get. We need to know whether or not this is a part of a phase or whether or not it's permanent, as best we can tell.

We've had cooling periods in our country -- or in our world before. We don't know the extent to which this is man made. We don't know the effects of it. The estimates of the results of all of this are all over the map. And I object to those people who say the books are closed, no more questions can be asked, we've got to now adopt the solutions that we're putting forth. We're not there yet.