One of my points, and I'll say it again, we don't really know if what we're measuring today can be compared to what we assume we're measuring from 650,000 years ago. There are too many variables we know nothing about.
The recent brough-ha-ha (sic) about the hole in the ozone layer... yes there was a hole. But no one had the technology to even know if it was unusual... or if it was normal... or if it was cyclic. Yes, we theoretically outlawed CFC's... and the hole it gone... but we still don't know if it was just part of a cycle which we could never measure before.
Do you really think puny little mankind can influence such drastic changes in the whole world's atmosphere in such a short time? I think not. Did we help? Possibly... but whatever happened to create the hole... and whatever happened to close the hole... was probably a normal part of "mother nature" doing her thing.
And I think "father sun" is going through a normal and regular cycle of warming up and cooling down and we are currently in a warming phase. As I said earlier, it's been this warm before. Warmer.
It's ridiculous to assume we're the cause. In fact, it's typical of our overinflated sense of importance.
PS. Gore's electic bill last year was reportedly in excess of $30K