The real answer (which all the polarized people hate on both sides) is "We don't know."

Those modelers? Great. Models were made for rocket launches too and guess what? No one ever thought of adding in what happens when foam falls off during launch. Oops.

Models are only as good as the data you put in. We don't HAVE enough data - or at least not enough good data. Meteorology is a fairly youthful science and reliable data isn't that old. Certainly not old enough for cycles which run in the hundreds or even thousands of years. We. Just. Don't. Know.

It's generally thought that the era of the dinosaurs was a lot warmer than now. Okay. So where were all the cars? Oh. Wait. Nope that couldn't have been man made. No men yet.

There is no question that we, as people, have an impact on the world around us. All animals do and we can be pretty impressive sometimes. Not too many other critters drill holes thousands of feed deep or wipe out whole mountainsides or forests.

It's a good idea, without question I think, to clean up our act. The big question is - at whose expense and how quickly? Some people think they have these answers and we need to do it yesterday. Others think they have the answers and we don't need to do it at all.

I expect the truth, as in most cases, lies somewhere in the middle.