I think they're smart enough to track weather and temperature over a couple hundred years and point to warming conditions, just not sure how long our weather cycles are. If we have an ice age every 100,000 years that seems to mean a 100,000 year weather cycle. I'm a little suspicious of accurate predations based on only a few hundred years of that cycle. Besides, if we warm a bit and slow down or stop the next ice age, isn't that a good thing? If I remember school correctly the last ice age covered a good bit of the Northern US.

